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. 2026 Feb 13;49(Suppl 2):e20250179. doi: 10.1590/1678-4685-GMB-2025-0179

Table 6- . Main criticisms and limitations of the Extended Evolutionary Synthesis (EES).

Criticism Description Main References
Lack of Novel Predictive Power EES mechanisms have not yet generated unique or superior predictions compared to those of the Modern Synthesis. Wray et al. (2014)
Sufficient Flexibility of Modern Synthesis Existing evolutionary theory is seen as adaptable enough to integrate new findings without a paradigm shift. Wray et al. (2014); Charlesworth et al. (2017)
Insufficient Quantitative and Population Models EES lacks rigorous mathematical models equivalent to those in population genetics, especially for epigenetics and soft inheritance. Lynch (2007); Charlesworth et al. (2017)
Conceptual Ambiguity Critics argue that EES often conflates proximate and ultimate causes, especially regarding plasticity and developmental bias. Dickins and Rahman (2012)
Lack of Empirical Necessity The empirical phenomena highlighted by EES are seen as addressable within the current framework and do not demand theoretical reconstruction. Charlesworth et al. (2017); Futuyma and Kirkpatrick (2017)
Overstatement of Novelty Many EES concepts (e.g., cultural transmission, horizontal gene transfer) have long been studied within evolutionary biology. Griffiths et al. (2008)
Limited Theoretical Integration Although EES brings attention to new processes, it lacks formal integration into models that allow for predictive and testable outcomes. Lynch (2007); Charlesworth et al. (2017)