Timothy M. Waring

Beyond existence and aiming outside the laboratory: estimating frequency-dependent and pay-off-biased social learning strategies

The existence of social learning has been confirmed in diverse taxa, from apes to guppies. In order to advance our understanding of the consequences of social transmission and evolution of behaviour, however, we require statistical tools that can distinguish among diverse social learning strategies. In this paper, we advance two main ideas. First, social learning is diverse, in the sense that individuals can take advantage of different kinds of information and combine them in different ways. Examining learning strategies for different information conditions illuminates the more detailed design of social learning. We construct and analyse an evolutionary model of diverse social learning heuristics, in order to generate predictions and illustrate the impact of design differences on an organisms fitness. Second, in order to eventually escape the laboratory and apply social learning models to natural behaviour, we require statistical methods that do not depend upon tight experimental control. Therefore, we examine strategic social learning in an experimental setting in which the social information itself is endogenous to the experimental group, as it is in natural settings. We develop statistical models for distinguishing among different strategic uses of social information. The experimental data strongly suggest that most participants employ a hierarchical strategy that uses both average observed pay-offs of options as well as frequency information, the same model predicted by our evolutionary analysis to dominate a wide range of conditions.

Controlling invasive species in complex social landscapes

Control of biological invasions depends on the collective decisions of resource managers across invasion zones. Regions with high land-use diversity, which we refer to as “management mosaics”, may be subject to severe invasions, for two main reasons. First, as land becomes increasingly subdivided, each manager assumes responsibility for a smaller portion of the total damages imposed by invasive species; the incentive to control invasives is therefore diminished. Secondly, managers opting not to control the invasion increase control costs for neighboring land managers by allowing their lands to act as an invader propagule source. Coordination among managers can help mitigate these effects, but greater numbers ‐ and a wider variety ‐ of land managers occupying a region hinder collective action. Here, we discuss the challenges posed by management mosaics, using a case study of the yellow starthistle (Centaurea solstitialis) invasion in the Sierra Nevada foothills of California. We suggest that the incorporation of management mosaic dynamics into invasive species research and management is essential for successful control of invasions, and provide recommendations to address this need.

A multilevel evolutionary framework for sustainability analysis

Sustainability theory can help achieve desirable social-ecological states by generalizing lessons across contexts and improving the design of sustainability interventions. To accomplish these goals, we argue that theory in sustainability science must (1) explain the emergence and persistence of social-ecological states, (2) account for endogenous cultural change, (3) incorporate cooperation dynamics, and (4) address the complexities of multilevel social-ecological interactions. We suggest that cultural evolutionary theory broadly, and cultural multilevel selection in particular, can improve on these fronts. We outline a multilevel evolutionary framework for describing social-ecological change and detail how multilevel cooperative dynamics can determine outcomes in environmental dilemmas. We show how this framework complements existing sustainability frameworks with a description of the emergence and persistence of sustainable institutions and behavior, a means to generalize causal patterns across social-ecological contexts, and a heuristic for designing and evaluating effective sustainability interventions. We support these assertions with case examples from developed and developing countries in which we track cooperative change at multiple levels of social organization as they impact social-ecological outcomes. Finally, we make suggestions for further theoretical development, empirical testing, and application.

Experimental platforms for behavioral experiments on social-ecological systems

Recently, there has been an increased interest in using behavioral experiments to study hypotheses on the governance of social-ecological systems. A diversity of software tools are used to implement such experiments. We evaluated various publicly available platforms that could be used in research and education on the governance of social-ecological systems. The aims of the various platforms are distinct, and this is noticeable in the differences in their user-friendliness and their adaptability to novel research questions. The more easily accessible platforms are useful for prototyping experiments and for educational purposes to illustrate theoretical concepts. To advance novel research aims, more elaborate programming experience is required to either implement an experiment from scratch or adjust existing experimental software. There is no ideal platform best suited for all possible use cases, but we have provided a menu of options and their associated trade-offs.

Are Religious Individuals More Generous, Trusting, and Cooperative? An Experimental Test of the Effect of Religion on Prosociality

We investigated the effect of religion on generosity, interpersonal trust, and cooperation by using games developed by experimental economists (Dictator, Trust, and Public Goods). In these experiments, individuals were paired or grouped with unknown strangers to test the degree to which religion promotes prosocial behavior. We evaluated group- and individual-level effects of religion on prosocial behavior across the three games. Although playing the games in a religious setting showed no overall difference as compared to a secular setting, we did find a weak association between some individual-level dimensions of religiosity and behavior in some of the games. The weak association between religion and behavior is consistent with theory and empirical studies using similar measures – the anonymous pairing and grouping of the economic games may moderate individual-level effects of religion. Our research is a strong complement to the empirical literature because the three studies involved a large and diverse sample and used sensitive instruments that have been found to reliably measure prosocial behavior.

Cultural group selection follows Darwin's classic syllogism for the operation of selection

The main objective of our target article was to sketch the empirical case for the importance of selection at the level of groups on cultural variation. Such variation is massive in humans, but modest or absent in other species. Group selection processes acting on this variation is a framework for developing explanations of the unusual level of cooperation between non-relatives found in our species. Our case for cultural group selection (CGS) followed Darwins classic syllogism regarding natural selection: If variation exists at the level of groups, if this variation is heritable, and if it plays a role in the success or failure of competing groups, then selection will operate at the level of groups. We outlined the relevant domains where such evidence can be sought and characterized the main conclusions of work in those domains. Most commentators agree that CGS plays some role in human evolution, although some were considerably more skeptical. Some contributed additional empirical cases. Some raised issues of the scope of CGS explanations versus competing ones.

TOWARDS UNIFICATION OF THE SOCIO-ECOLOGICAL SCIENCES: THE VALUE OF COUPLED MODELS

Abstract. The major environmental problems of the twenty‐first century, including climate change, water scarcity, pollution and resource exhaustion, represent a new category of crisis and highlight the desperate need for an integrated science of socio‐ecological phenomena. To help establish the foundations of such a science, we explore three traditions of mathematical theory: the Lotka–Volterra interactions of ecological theory, niche construction models of population genetics, and theory from the gene–culture coevolution tradition. We review the theoretical tools of each of these traditions in explaining cultural articulation with the environment. Although the theoretical core of the science we propose does not exist, cultural evolutionary theory supplies useful tools to analyse endogenous culture, cultural dynamics, and deeply rooted behavioural links to the environment. We also present a coupled model for demonstration, and suggest that coupled socio‐ecological models can provide a formal theory to help address the emergent socio‐ecological problems of the future.

Ethnic Forces in Collective Action: Diversity, Dominance, and Irrigation in Tamil Nadu

Mounting evidence suggests that ethnic interactions damage cooperation in the provision of public goods, yet very few studies of collective action in common pool resource management have found strong evidence for the effects of ethnic diversity. Research on both public goods and common pool resource management that does find negative ethnic effects on cooperation tend to ignore the importance of interethnic relationships, particularly ethnic inequality, stratification, or dominance. This study presents data from agricultural villages in Tamil Nadus Palani Hills to test the importance of a range of ethnic effects using caste interactions in a traditional irrigation system. I provide corroborating evidence of a negative cooperative effect of ethnic diversity, but also demonstrate that factors of ethnic dominance such as hierarchical stratification and demographic dominance strongly determine outcomes in collective irrigation management. I argue that the most important measure of equity, irrigation access, is socially, technologically, and institutionally embedded, and demonstrate that the distribution of irrigation channels is explained by measures of inequality, such as wealth inequality, Dalit status, and demographic dominance.

Evidence of cultural group selection in territorial lobstering in Maine

Relatively little is known about how resource conservation practices and institutions emerge. We examine the historical emergence of territoriality and conservation rules in Maine’s lobstering industry, using a cultural evolutionary perspective. Cultural evolution suggests that cultural adaptations such as practices and institutions arise as a result of evolutionary selection pressure. The cultural multilevel selection framework of Waring et al. (Ecol Soc, 2015) further proposes that group cultural adaptations tend to emerge at a level of social organization corresponding to the underlying dilemma. Drawing on detailed history and ethnography, we conduct a retrospective assessment to determine which levels of social organization experienced selection pressures that might explain the emergence of lobstering territoriality and conservation practices we observe in history. The evidence strongly suggests that informal territoriality evolved by selection on harbor gang behavior, while some conservation practices spread via selection at other levels from individuals to regional lobstering zones. We identify two apparent historical shifts in the dominant level of selection for these practices over the history of the industry and discuss the implications of this trajectory for the evolution of lobster management in the Gulf of Maine.

Applying cultural evolution to sustainability challenges: an introduction to the special issue

Human activity at multiple scales is the primary driver of the environmental challenges humanity faces (Steffen et al. 2007). Numerous scholars have argued that addressing environmental problems will require large-scale change in human behavior and the institutional, social and cultural forces that shape behavior (Princen 2003; Speth 2008; Beddoe et al. 2009; Assadourian 2010; Kinzig et al. 2013). In fact, most definitions of sustainability and sustainable development implicitly or explicitly recognize the need for changes in human perspectives, aspirations, technologies, norms, or worldviews—in short, culture1. However, calls for cultural change often stop short of proposing the precise mechanisms through which such change may occur precisely because the relevant mechanisms of behavioral and cultural change are not known. The multiple disciplines that comprise the social sciences and humanities have different and, often competing, theories of cultural change that operate at multiple levels of human organization. These disciplinary differences have been a challenge for sustainability science (Gardner 2013), and the absence of a robust, non-disciplinary, theoretical framework hinders progress towards a deeper understanding of when and how sustainable social-ecological systems emerge (Levin and Clark 2010). Recently, sustainability scientists have been explicit about the need to incorporate mechanisms of cultural change in their research (Beddoe et al. 2009; Caldas et al. 2015) and to clarify the exact mechanisms involved (Ehrlich and Levin 2005; Waring et al. 2015). Importantly, cultural evolution theory offers an integrative approach to studying the dynamics of cultural change based on causal models of the mechanisms through which individual and population processes interact. Despite many examples of sustainable resource management, exploitative and unsustainable resource management are common (Steffen et al. 2007). However, cultural change may be important for driving the proliferation of sustainable practices. This is because, although evolved genetic mechanisms, ecological processes, and socio-cultural mechanisms all influence resource use, social conditions often change more quickly than ecological conditions and cultural evolution is more rapid than genetic evolution (Perreault 2012). As such, there is an urgent need for sustainability scientists to develop more holistic or inclusive models to explain and integrate socio-cultural mechanisms of change at both individual and institutional levels (Borgerhoff Mulder and Coppolillo 2005). Such models are needed to inform sustainability policy solutions that can be applied cross-culturally and in divergent contexts. Currently, however, the dynamics of cultural change are not well understood in the context of sustainability. By focusing on applications of cultural evolution, we view this special issue as a starting point for determining how we can harness processes of cultural change Applying Cultural Evolution to Sustainability Challenges