The work is the product of more than twenty years of research during which Higgins tried to uncover "a most ancient and universal religion from which all later creeds and doctrines sprang." It includes several
maps and
lithographic plates of
Druidical Monuments. The book itself details many of Higgins' beliefs and observations about the development of religion. Among these was his theory that a secret religious order, which he labeled "Pandeism" (from Pans- or Pandu- referring to a family of Gods, appending with -ism), had continued from ancient times to the present day, stretching at least from Greece to India, and possibly having once covered the entire world. Among the many theories presented in this book is that both the
Celtic Druids and the
Jews originated in India – and that the name of the
Biblical Abraham is really a variation of the word
Brahma, created by shifting the last letter to the beginning: Abrahma. Higgins used the term "Pandeism" to describe the religious society that he purported had existed from ancient times, and at one time had been known throughout the entire world. Higgins believed this practice continued in secret until the time of his writing, in the 1830s in an area stretching from
Greece to India. His usage appears related to
pantheism, but is distinctly different. While pantheism normally refers to one universal god, the Pandeism described by Higgins, refers to the worship of a family, a union, or a
pantheon of gods which are collectively universal. Higgins was a follower of
John Toland; although Toland had lived in an era when "deism" and "theism" were interchangeable, Higgins wrote during the 1820s and 1830s, a period several generations later when
deism was popular and became distinct from
theism. When coining "Pandeism", Higgins showed his awareness of the similarity between Pandeism and
pantheism by directly contrasting his Pandeism with Toland's pantheism: Higgins was also aware of the similarity between his Pandeism and deism, and demonstrated familiarity with deism, as he mentions deism or deists at several other points in the same work. Higgins noted for example that "the
Rev. R. Taylor, A.M., the Deist, now in jail, persecuted by the
Whigs for his religious opinions, in his learned defense of Deism called the
Diegesis, has clearly proved all the hierarchical institutions of the Christians to be a close copy of those of the
Essenians of
Egypt." While more contemporary
pandeism evokes both pantheism and deism and suggests their combination, Higgins' usage is removed from both. Whereas Toland's construction of pantheism was based on the
Greek root words
pan, meaning
all and
Theos, meaning
God, Higgins flips the construction around, stating: In contrast to Toland, Higgins uses the word "Pans" or "Pande" to collect variations of named gods or godlike heroes – such as
Pandu, Pandæa, the
Pandavas, and Pandion – into a single system of worship called "Pandeism" as a sort of family name for a group of godlike individuals. Thus where Toland's term referred to pan- (all) and -theism (god), Higgins refers to Pande- (a root indicating this family of gods) and
-ism, a wholly English construction indicating allegiance to an ideology. The term related by Higgins refers to a secret sect of worshipers of these "Pans", which was left in the wake of the collapse of an ancient empire that stretched from
Greece (the home of
Medea and
Perseus) to India (where the
Buddhists and the
Brahmins coexist). Higgins concludes that his observations: While worthy of note, the above discussion is an example of what Higgins tries to present in his work: that religious scripture is written in a manner to confuse rather than clarify. The exhaustive discussion above comparing "Pandeism" and "Pantheism", while valid, fails to disclose the main emphasis of his effort, which is to show that all religions are the same and from a lost, antediluvian, original source in which all characters are allegoric representations of the zodiac with the primary deity being the sun. His theory is that this lost doctrine has been corrupted, by ignorance of allegory or by intentional purposes, from ancient times up and through Higgins' own time. ==Death and later influence==