The evolution of conformist social learning can cause population collapse in realistically variable environments
David Bourget (Western Ontario)
David Chalmers (ANU, NYU)
Rafael De Clercq
Jack Alan Reynolds
Learn more about PhilPapers
Why do societies collapse? We use an individual-based evolutionary model to show that, in environmental conditions dominated by low-frequency variation (“red noise”), extirpation may be an outcome of the evolution of cultural capacity. Previous analytical models predicted an equilibrium between individual learners and social learners, or a contingent strategy in which individuals learn socially or individually depending on the circumstances. However, in red noise environments, whose main signature is that variation is concentrated in relatively large, relatively rare excursions, individual learning may be selected from the population. If the social learning system comes to lack sufficient individual learning or cognitively costly adaptive biases, behavior ceases tracking environmental variation. Then, when the environment does change, fitness declines and the population may collapse or even be extirpated. The modeled scenario broadly fits some human population collapses and might also explain nonhuman extirpations. Varying model parameters showed that the fixation of social learning is less likely when individual learning is less costly, when the environment is less red or more variable, with larger population sizes, and when learning is not conformist or is from parents rather than from the general population. Once social learning is fixed, extirpation is likely except when social learning is biased towards successful models. Thus, the risk of population collapse may be reduced by promoting individual learning and innovation over cultural conformity, or by preferential selection of relatively fit individuals as models for social learning. © 2009 Elsevier Inc. All rights reserved.
|Keywords||No keywords specified (fix it)|
|Categories||categorize this paper)|
Setup an account with your affiliations in order to access resources via your University's proxy server
Configure custom proxy (use this if your affiliation does not provide a proxy)
|Through your library||
References found in this work BETA
No references found.
Citations of this work BETA
Wataru Nakahashi, Joe Yuichiro Wakano & Joseph Henrich (2012). Adaptive Social Learning Strategies in Temporally and Spatially Varying Environments. Human Nature 23 (4):386-418.
Luke Rendell, Laurel Fogarty, William J. E. Hoppitt, Thomas J. H. Morgan, Mike M. Webster & Kevin N. Laland (2011). Cognitive Culture: Theoretical and Empirical Insights Into Social Learning Strategies. Trends in Cognitive Sciences 15 (2):68-76.
Similar books and articles
Dorothy M. Fragaszy (2000). Extending the Model: Pavlovian Social Learning. Behavioral and Brain Sciences 23 (2):255-256.
Evelyn Gick & Wolfgang Gick (2001). F.A. Hayek's Theory of Mind and Theory of Cultural Evolution Revisited: Toward and Integrated Perspective. [REVIEW] Mind and Society 2 (1):149-162.
Peter J. Richerson, Beyond Existence and Aiming Outside the Laboratory: Estimating Frequency-Dependent and Payoﬀ-Biased Social Learning Strategies.
Kevin Kelly (2004). Learning Theory and Epistemology. In Ilkka Niiniluoto, Matti Sintonen & Jan Wolenski (eds.), Handbook of Epistemology. Dordrecht: Kluwer Academic Pub. 183--203.
Kenneth Reisman (2007). Is Culture Inherited Through Social Learning? Biological Theory 2 (3):300-306.
Added to index2009-08-16
Total downloads12 ( #141,435 of 1,413,285 )
Recent downloads (6 months)1 ( #154,925 of 1,413,285 )
How can I increase my downloads?