History is a wide field of inquiry encompassing many branches. Some branches focus on a specific time period, while others concentrate on a particular geographic region or a distinct theme. Specializations of different types can usually be combined; for example, a work on economic history in ancient Egypt merges temporal, regional, and thematic perspectives. For topics with a broad scope, the amount of primary sources is often too extensive for an individual historian to review, forcing them to either narrow the scope of their topic or also rely on secondary sources to arrive at a wide overview.
By period Chronological division is a common approach to organizing the vast expanse of history into more manageable segments. Different
periods are often defined based on dominant themes that characterize a specific time frame and significant events that initiated these developments or brought them to an end. Depending on the selected context and level of detail, a period may be as short as a decade or longer than several centuries. A traditionally influential approach divides
human history into
prehistory,
ancient history,
post-classical history,
early modern history, and
modern history. Depending on the region and theme, the time frames covered by these periods can vary and historians may use entirely different periodizations. For example, traditional periodizations of
Chinese history follow the
main dynasties, and the division into
pre-Columbian,
colonial, and post-colonial periods plays a central role in the
history of the Americas. . The study of prehistory includes the examination of the evolution of
human-like species several million years ago, leading to the emergence of
anatomically modern humans about 200,000 years ago. Subsequently,
humans migrated out of Africa to populate most of the earth. Towards the end of prehistory, technological advances in the form of new and improved tools led many groups to give up their established
nomadic lifestyle, based on
hunting and gathering, in favour of a
sedentary lifestyle supported by
early forms of agriculture. The absence of written documents from this period presents researchers with unique challenges. It results in an interdisciplinary approach relying on other forms of evidence from fields such as
archaeology,
anthropology,
palaeontology, and
geology. Historians studying the ancient period examine the
emergence of the first major civilizations in regions such as
Mesopotamia, Egypt, the
Indus Valley, China, and Peru, beginning approximately 3500 BCE in some regions. The new social, economic, and political complexities necessitated the
development of writing systems. Thanks to advancements in agriculture, surplus food allowed these civilizations to support larger populations, leading to
urbanization, the establishment of trade networks, and the emergence of regional empires. In the later part of the ancient period, sometimes termed the
classical period, societies in China, India, Persia, and the Mediterranean expanded further, reaching new cultural, scientific, and political heights. Meanwhile, influential religious systems and philosophical ideas were first formulated, such as
Hinduism,
Buddhism,
Confucianism,
Judaism, and
Greek philosophy. In the study of post-classical or medieval history, which began around 500 CE, historians note the growing influence of major religions.
Missionary religions, like Buddhism,
Christianity, and
Islam, spread rapidly and established themselves as
world religions, marking a cultural shift as they gradually replaced other belief systems. Meanwhile, inter-regional trade networks flourished, leading to increased technological and cultural exchange. Conquering many territories in Asia and Europe, the
Mongol Empire became a dominant force during the 13th and 14th centuries. Historians focused on early modern history, which started roughly in 1500 CE, commonly highlight how European states rose to global power. As
gunpowder empires, they explored and
colonized large parts of the world. As a result, the Americas were integrated into the global network, triggering a vast
biological exchange of plants, animals, people, and diseases. The
Scientific Revolution prompted major discoveries and accelerated technological progress. It was accompanied by other intellectual developments, such as
humanism and the
Enlightenment, which ushered in
secularization. to
industrial societies. In the study of modern history, which began at the end of the 18th century, historians are interested in how the
Industrial Revolution transformed economies by introducing more efficient modes of production. Western powers
established vast colonial empires, gaining superiority through industrialized military technology. The increased international exchange of goods, ideas, and people marked the beginning of
globalization. Various social revolutions challenged
autocratic and colonial regimes, paving the way for
democracies. Many developments in fields like science, technology, economy, living standards, and human population accelerated at unprecedented rates. This happened despite the widespread destruction caused by two
world wars, which rebalanced international power relations by undermining European dominance.
By geographic location Areas of historical study can also be categorized by the geographic locations they examine.
Geography plays a central role in history through its influence on
food production,
natural resources, economic activities, political boundaries, and cultural interactions. Some historical works limit their scope to small regions, such as a village or a settlement. Others focus on broad territories that encompass entire continents, like the histories of Africa, Asia, Europe, the Americas, and Oceania. showcase the lasting heritage of the ancient Egyptian civilization. The
history of Africa begins with the examination of the evolution of anatomically modern humans. Ancient historians describe how the invention of writing and the establishment of civilization happened in
ancient Egypt in the 4th millennium BCE. Over the next millennia, other notable civilizations and kingdoms formed in
Nubia,
Axum,
Carthage,
Ghana,
Mali, and
Songhay. Islam began spreading across North Africa in the 7th century CE and became the dominant faith in many empires. Meanwhile, trade along the
trans-Saharan route intensified. Beginning in the 15th century, millions of Africans were enslaved and forcibly transported to the Americas as part of the
Atlantic slave trade. Most of the continent
was colonized by European powers in the late 19th and early 20th centuries. Amid rising
nationalism, African states gradually
gained independence in the aftermath of
World War II, a period that saw economic progress, rapid population growth, and struggles for political stability. Historians studying the
history of Asia note the arrival of anatomically modern humans around 100,000 years ago. They explore Asia's role as one of the cradles of civilization, with the emergence of some of the first ancient civilizations in Mesopotamia, the Indus Valley, and China beginning in the 4th and 3rd millennia BCE. In the following millennia, civilizations on the Asian continent gave birth to all major world religions and several influential philosophical traditions, such as Hinduism, Buddhism, Confucianism,
Taoism, Christianity, and Islam. Other developments were the establishment of the
Silk Road, which facilitated trade and cultural exchange across
Eurasia, and the formation of powerful empires, such as the Mongol Empire. European influence grew over the following centuries, ushering in the modern era. It culminated in the 19th and early 20th centuries when many parts of Asia came under direct colonial control
until the end of World War II. The post-independence period was characterized by modernization, economic growth, and a steep increase in population. is an important area of study for historians of Europe. In the study of the
history of Europe, historians describe the arrival of the first anatomically modern humans about 45,000 years ago. They explore how in the first millennium BCE the
Ancient Greeks contributed key elements to the
culture,
philosophy, and politics associated with the
Western world, The
medieval period began with the fall of the
Western Roman Empire in the 5th century CE and was marked by the
spread of Christianity. Starting in the 15th century, European exploration and colonization interconnected the globe, while cultural, intellectual, and scientific developments transformed Western societies. From the late 18th to the early 20th centuries, European global dominance was further solidified by the Industrial Revolution and the establishment of large overseas colonies. It came to an end because of the devastating effects of two world wars. In the following
Cold War era, the continent was divided into a
Western and an
Eastern bloc. They pursued political and economic integration in the aftermath of the Cold War. Historians examining the history of the Americas document the arrival of the first humans around 20,000 to 15,000 years ago. The Americas were home to some of the earliest civilizations, like the
Norte Chico civilization in South America and the
Maya and
Olmec civilizations in Central America. Over the next millennia, major empires arose beside them, such as the
Teotihuacan,
Aztec, and
Inca empires. Following the arrival of the Europeans from the late 15th century onwards, the spread of newly introduced diseases drastically reduced the local population. Together with colonization, it led to the collapse of major empires as demographic and cultural landscapes were reshaped.
Independence movements in the 18th and 19th centuries led to the formation of new nations across the Americas. In the 20th century, the United States emerged as a dominant global power and a key player in the Cold War. In the study of the
history of Oceania, historians note the arrival of humans about 60,000 to 50,000 years ago. They explore the establishment of
diverse regional societies and cultures, first in Australia and Papua New Guinea and later also on other
Pacific Islands. The arrival of the Europeans in the 16th century prompted significant transformations, and by the end of the 19th century, most of the region had come under Western control. Oceania became involved in various conflicts during the world wars and experienced
decolonization in the post-war period.
By theme Historians often limit their inquiry to a specific theme. Some propose a general subdivision into three major themes:
political history,
economic history, and
social history. However, the boundaries between these branches are vague and their relation to other thematic branches, such as
intellectual history, is not always clear. Political history studies the organization of
power in society, examining how power structures arise, develop, and interact. Throughout most of recorded history,
states or state-like structures have been central to this field of study. It explores how a state was
organized internally, like
factions,
parties, leaders, and other political institutions. It also examines which
policies were implemented and how the state interacted with other states. Political history has been studied since antiquity by historians such as Herodotus and Thucydides, making it one of the oldest branches of history, while other major subfields have only become established branches in the past century. s.
Diplomatic and
military history are associated with political history. Diplomatic history examines
international relations between states. It covers
foreign policy topics such as negotiations, strategic considerations,
treaties, and conflicts between nations as well as the role of
international organizations in these processes. Military history studies the impact and development of
armed conflicts in human history. This includes the examination of specific events, like the analysis of a particular battle and the discussion of the different causes of a war. It also involves more general considerations about the evolution of warfare, including advancements in
military technology,
strategies,
tactics,
logistics, and institutions. Economic history examines how
commodities are produced, exchanged, and consumed. It covers economic aspects such as the use of land,
labour, and
capital, the
supply and demand of goods, the costs and
means of production, and the
distribution of income and
wealth. Economic historians typically focus on general trends in the form of impersonal forces, such as
inflation, rather than the actions and decisions of individuals. If enough data is available, they rely on quantitative methods, like statistical analysis. For periods before the modern era, available data is often limited, forcing economic historians to rely on scarce sources and extrapolate information from them. Social history is a broad field investigating social phenomena, but its precise definition is disputed. Some theorists understand it as the study of everyday life outside the domains of politics and economics, including cultural practices, family structures, community interactions, and education. A closely related approach focuses on experience rather than activities, examining how members of particular social groups, like
social classes,
races,
genders, or
age groups, experienced their world. Other definitions see social history as the study of social problems, like poverty, disease, and crime, or take a broader perspective by examining how whole
societies developed. Closely related fields include
cultural history,
gender history, and
religious history. Intellectual history is the history of ideas and studies how concepts, philosophies, and
ideologies have evolved. It is particularly interested in academic fields but not limited to them, including the study of the beliefs and prejudices of ordinary people. In addition to studying intellectual movements themselves, it also examines the cultural and social contexts that shaped them and their influence on other historical developments. As closely related fields, the
history of philosophy investigates the development of philosophical thought while the
history of science studies the evolution of scientific theories and practices, such as the scientific contributions of
Charles Darwin and
Albert Einstein.
Art history, another connected discipline, examines historical
works of art and the development of artistic activities,
styles, and
movements. It includes a discussion of the cultural, social, and political contexts of art production.
Environmental history studies the relation between humans and their environment. It seeks to understand how humans and the rest of nature have affected each other in the course of history. Other thematic branches include
constitutional history,
legal history,
urban history,
business history,
history of technology,
medical history,
history of education, and
people's history.
Others Some branches of history are characterized by the
methods they employ, such as
quantitative history and
digital history, which rely on
quantitative methods and
digital media.
Comparative history compares historical phenomena from distinct times, regions, or cultures to examine their similarities and differences. Unlike most other branches,
oral history relies on oral reports rather than written documents, encompassing eyewitness accounts,
hearsay, and communal
legends. It reflects the personal experiences, interpretations, and
memories of common people, showcasing how people subjectively remember the past.
Counterfactual history uses
counterfactual thinking to examine alternative courses of history, exploring what could have happened under different circumstances. Certain branches of history are distinguished by their theoretical outlook, such as
Marxist and
feminist history. examines history on a global level, incorporating the whole of
human history. Some distinctions focus on the scope of the studied topic.
Big History is the branch with the broadest scope, covering everything from the
Big Bang to the present, incorporating elements of
cosmology, geology,
biology, and anthropology. Closely related to microhistory is the genre of
historical biography, which recounts an individual's life in its historical context and the legacy it left.
Public history involves activities that present history to the
general public. It usually happens outside the traditional academic settings in contexts like
museums,
historical sites,
heritage tourism, and popular media. == Evolution of the discipline ==