Since its launching in 1967, research on critical junctures has focused in part on developing a theoretical framework, which has evolved over time. In studies of society, some scholars use the term "punctuated equilibrium" model, and others the term "neo-episodic" model. Studies of knowledge continue to use the term "paradigm shift". However, these terms can be treated as
synonyms for critical juncture.
Developments in the late 1960s–early 1970s Key ideas in critical junctures research were initially introduced in the 1960s and early 1970s by Seymour Lipset, Stein Rokkan, and
Arthur Stinchcombe.
Critical junctures and legacies Seymour Lipset and Stein Rokkan (1967) and Rokkan (1970) introduced the idea that big discontinuous changes, such as the
reformation, the building of
nations, and the
Industrial Revolution, reflected conflicts organized around
social cleavages, such as the center-periphery, state-church, land-industry, and owner-worker cleavages. In turn, these big discontinuous changes could be seen as critical junctures because they generated social outcomes that subsequently remained "frozen" for extensive periods of time. In more general terms, Lipset and Rokkan's model has three components: • (1)
Cleavage. Strong and enduring conflicts that polarize a political system. Four such cleavages were identified: • The center–periphery cleavage, a conflict between a central nation-building culture and ethnically linguistically distinct subject populations in the peripheries. • The state–church cleavage, a conflict between the aspirations of a nation-state and the church. • The land–industry cleavage, a conflict between landed interests and commercial/industrial entrepreneurs. • The worker–employer cleavage, a conflict between owners and workers. • (2) Critical juncture. Radical changes regarding these cleavages happen at certain moments. • (3) Legacy. Once these changes occur, their effect endures for some time afterwards. Rokkan (1970) added two points to these ideas. Critical junctures could set countries on divergent or convergent paths. Critical junctures could be "sequential," such that a new critical juncture does not totally erase the legacies of a previous critical juncture but rather modifies that previous legacy.
The reproduction of legacies through self-replicating causal loops Arthur Stinchcombe (1968) filled a key gap in Lipset and Rokkan's model. Lipset and Rokkan argued that critical junctures produced legacies, but did not explain how the effect of a critical juncture could endure over a long period. Stinchcombe elaborated the idea of historical causes (such as critical junctures) as a distinct kind of
cause that generates a "self-replicating
causal loop." Stinchcombe explained that the distinctive feature of such a loop is that "an effect created by causes at some previous period becomes a cause of that same effect in succeeding periods." This loop was represented graphically by Stinchcombe as follows: X t1 ––> Y t2 ––> D t3 ––> Y t4 ––> D t5 ––> Y t6 Stinchcombe argued that the cause (X) that explains the initial adoption of some social feature (Y) was not the same one that explains the persistence of this feature. Persistence is explained by the repeated effect of Y on D and of D on Y.
Developments in the early 1980s–early 1990s Additional contributions were made in the 1980s and early 1990s by various political scientists and economists.
Punctuated equilibrium, path dependence, and institutions Paul A. David and
W. Brian Arthur, two economists, introduced and elaborated the concept of
path dependence, the idea that past events and decisions affect present options and that some outcomes can persist due to the operation of a
self-reinforcing feedback loop. This idea of a self-reinforcing feedback loop resembles that of a self-replicating causal loop introduced earlier by Stinchcombe. However, it resonated with economists and led to a growing recognition in economics that "history matters." The work by
Stephen Krasner in political science incorporated the idea of
punctuated equilibrium into the social sciences. Krasner also drew on the work by Arthur and connected the idea of path dependence to the study of political institutions.
Douglass North, an economist and
Nobel laureate, applied the idea of path dependence to
institutions, which he defined as "the rules of the game in a society," and drew attention to the persistence of institutions.
A synthesis Political scientists Ruth Berins Collier and
David Collier, in
Shaping the Political Arena (1991), provided a synthesis of many ideas introduced from the 1960s to 1990, in the form of the following "five-step template": Antecedent Conditions ––>
Cleavage or Shock ––>
Critical Juncture ––> Aftermath ––>
Legacy These key concepts have been defined as follows: • (1) "
Antecedent conditions are diverse socioeconomic and political conditions prior to the onset of the critical juncture that constitute the baseline for subsequent change." • (2) "
Cleavages,
shocks, or
crises are triggers of critical junctures." • (3) "
Critical junctures are major episodes of institutional change or innovation." • (4) "The
aftermath is the period during which the legacy takes shape." • (5) "The
legacy is an enduring, self-reinforcing institutional inheritance of the critical juncture that stays in place and is stable for a considerable period."
Debates since the 2000s Following a period of consolidation of critical junctures framework, few new developments occurred in the 1990s. However, since around 2000, several new ideas were proposed and many aspects of the critical junctures framework are the subject of debate.
Critical junctures and incremental change An important new issue in the study of change is the relative role of critical junctures and
incremental change. On the one hand, the two kinds of change are sometimes starkly counterposed.
Kathleen Thelen emphasizes more gradual, cumulative patterns of institutional evolution and holds that "the conceptual apparatus of path dependence may not always offer a realistic image of development." On the other hand, path dependence, as conceptualized by Paul David is not
deterministic and leaves room for policy shifts and institutional innovation.
Critical junctures and contingency Einar Berntzen notes another debate: "Some scholars emphasize the historical contingency of the choices made by political actors during the critical juncture." For example, Michael Bernhard writes that critical junctures "are periods in which the constraints of structure have weakened and political actors have enhanced autonomy to restructure, overturn, and replace critical systems or sub-systems." However, Berntzen holds that "other scholars have criticized the focus on
agency and contingency as key causal factors of institutional path selection during critical junctures" and "argue that a focus on antecedent conditions of critical junctures is analytically more useful." For example, Dan Slater and Erica Simmons place a heavy emphasis on antecedent conditions. Schenoni provides a synthesis by suggesting that critical junctures (longer windows such as wars) where antecedents play a causal role, contain critical events (shorter episodes such as battles) where contingency is more clear.
Legacies and path dependence The use of the concept of path dependence in the study of critical junctures has been a source of some debate. On the one hand, James Mahoney argues that "path dependence characterizes specifically those historical sequences in which contingent events set into motion institutional patterns or event chains that have deterministic properties" and that there are two types of path dependence: "self-reinforcing sequences" and "reactive sequences." On the other hand, Kathleen Thelen and other criticize the idea of path dependence
determinism, and Jörg Sydow, Georg Schreyögg, and Jochen Koch question the idea of reactive sequences as a kind of path dependence.
Institutional and behavioral path dependence The study of critical junctures has commonly been seen as involving a change in
institutions. However, many works extend the scope of research of critical junctures by focusing on changes in
culture. Avidit Acharya, Matthew Blackwell, and Maya Sen state that the persistence of a legacy can be "reinforced both by formal institutions, such as
Jim Crow laws (a process known as
institutional path dependence), and also by informal institutions, such as family
socialization and community
norms (a process we call
behavioral path dependence)." ==Substantive applications in the social sciences==