Experimental games model situations in which the future outcomes of individuals and
groups depend on their own choices and on those of other (groups of) individuals. Games …

Highlights•People cooperate more when they can choose partners than when partners are
fixed.•Partner choice creates a 'biological market'for the best partners.•Partners are chosen …

What is morality? And to what extent does it vary around the world? The theory of “morality-
as-cooperation” argues that morality consists of a collection of biological and cultural …

Agent-based modeling (ABM) is a novel computational methodology for representing the
behavior of individuals in order to study social phenomena. Its use is rapidly growing in …

Where did we come from? What is our connection with other life forms? What are the
mechanisms of mind that define what it means to be a human being? Evolutionary …

Kombucha, a fermented tea beverage with an acidic and effervescent taste, is composed of
a multispecies microbial ecosystem with complex interactions that are characterized by both …

When organisms can choose whom to interact with, it can create a biological market where
individuals need to outbid their rivals for access to cooperative relationships. Each …

The scientific study of networks-computer, social, and biological-has received an enormous
amount of interest in recent years. However, the network approach has been applied to the …

Leaving one mating relationship and entering another, serial mating, is commonly observed
in many cultures. An array of circumstances can prompt a mate switch. These include (1) …

In-group favoritism is a central aspect of human behavior. People often help members of
their own group more than members of other groups. Here we propose a mathematical …