Reconciling long-term cultural diversity and short-term collective social behavior

Abstract

An outstanding open problem is whether collective social phenomena occurring over short timescales can systematically reduce cultural heterogeneity in the long run, and whether offline and online human interactions contribute differently to the process. Theoretical models suggest that short-term collective behavior and long-term cultural diversity are mutually excluding, since they require very different levels of social influence. The latter jointly depends on two factors: the topology of the underlying social network and the overlap between individuals in multidimensional cultural space. However, while the empirical properties of social networks are well understood, little is known about the large-scale organization of real societies in cultural space, so that random input specifications are necessarily used in models. Here we use a large dataset to perform a high-dimensional analysis of the scientific beliefs of thousands of Europeans. We find that inter-opinion correlations determine a nontrivial ultrametric hierarchy of individuals in cultural space, a result unaccessible to one-dimensional analyses and in striking contrast with random assumptions. When empirical data are used as inputs in models, we find that ultrametricity has strong and counterintuitive effects, especially in the extreme case of long-range online-like interactions bypassing social ties. On short time-scales, it strongly facilitates a symmetry-breaking phase transition triggering coordinated social behavior. On long time-scales, it severely suppresses cultural convergence by restricting it within disjoint groups. We therefore find that, remarkably, the empirical distribution of individuals in cultural space appears to optimize the coexistence of short-term collective behavior and long-term cultural diversity, which can be realized simultaneously for the same moderate level of mutual influence.

References in corpus (15)

• Statistical physics of social dynamics
• Structure and tie strengths in mobile communication networks
• Multirelational Organization of Large-scale Social Networks in an Online World
• Robust dynamic classes revealed by measuring the response function of a social system
• Cooperative Behavior Cascades in Human Social Networks
• Homophily, Cultural Drift and the Co-Evolution of Cultural Groups
• Consensus formation on adaptive networks
• The Spontaneous Emergence of Social Influence in Online Systems
• Characterizing and modeling the dynamics of online popularity
• Measuring social dynamics in a massive multiplayer online game
• Individualization as driving force of clustering phenomena in humans
• Scaling and universality in proportional elections
• Self-organized network evolution coupled to extremal dynamics
• Dynamical organization towards consensus in the Axelrod model on complex networks
• Local Convergence and Global Diversity: The Robustness of Cultural Homophily

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• Signs of universality in the structure of culture
• Ultrametricity increases the predictability of cultural dynamics
• Transmission of cultural traits in layered ego-centric networks
• Evidence for mixed rationalities in preference formation
• Universal size effects for populations in group-outcome decision-making problems
• The role of zealots in the spread of linguistic traits
• The sensitivity of the Deffuant model to measurement error
• A random matrix perspective of cultural structure: groups or redundancies?