A ubiquitous type of collective behavior and decision-making is the coordinated motion of
bird flocks, fish schools, and human crowds. Collective decisions to move in the same …

We introduce a general contagionlike model for competing opinions that includes dynamic
resistance to alternative opinions. We show that this model can describe candidate vote …

The challenge for a psychology of crowds and collective behavior is to explain how large
numbers of people are, spontaneously, able to act together in patterned and socially …

What are the principles that keep our society together? This question is even more difficult to
answer than the long-standing question, what are the forces that keep our world together …

Relationships we have with our friends, family, or colleagues influence our personal
decisions, as well as decisions we make together with others. As in human beings …

Adaptive models of opinion formation among humans can display a fragmentation transition,
where a social network breaks into disconnected components. Here we investigate this …

There has been considerable progress in investigating collective actions in the last decades.
However, the real progress is different from what many scholars take it to be. It lies in the fact …

Statistical physics has proven to be a fruitful framework to describe phenomena outside the
realm of traditional physics. Recent years have witnessed an attempt by physicists to study …

We have studied how leaders emerge in a group as a consequence of interactions among
its members. We propose that leaders can emerge as a consequence of a self-organized …

Agent-based models of opinion dynamics allow one to examine the spread of opinions
between entities and to study phenomena such as consensus, polarization, and …