Christopher X J. Jensen
Associate Professor, Pratt Institute

NPR provides a quick overview of the human drive to reciprocate

Posted 26 Nov 2012 / 0

National Public Radio Shots “Give And Take: How The Rule Of Reciprocation Binds Us” I appreciate the far-ranging nature of this piece, and how it applies a basic understanding of reciprocity to larger social phenomena. There is not much here about how genetic and environmental factors modify how reciprocal people choose to behave; while there Read More

A Minor Post, Behavior, Cooperation, Cultural Anthropology, Cultural Evolution, Emotion, Ethics, Evolutionary Psychology, Human Evolution, Political Science, Psychology, Public Policy, Radio & Podcasts, Reciprocity, Reputation, Social Norms, Sociology

Enforcing norms may be for personal gain, not to maintain social order (at least amongst Santa Barbara undergraduates)

Posted 28 Sep 2012 / 2

PLoS ONE “What Are Punishment and Reputation for?” Once again, a valuable and ingenious experiment over-reaches on the meaning of its finding, and the over-reach bleeds into the popular media. This is a really valuable experiment in that it asks about the scale at which social norms are enforced. It is significant that participants in Read More

A Minor Post, Articles, Behavior, Cooperation, Ethics, Evolutionary Psychology, Group Selection, Human Evolution, Multilevel Selection, Psychological Adaptation, Punishment, Reciprocity, Reputation, Social Networks, Social Norms

Despite great press for Dyson, the Iterated Prisoner’s Dilemma is still not the solution to human cooperation

Posted 19 Sep 2012 / 0

The Chronicle of Higher Education “To the Trickster Go the Spoils” I really appreciate that Freeman Dyson acknowledges so clearly in this article that the fact that he has found a deceitful solution to the Iterated Prisoner’s Dilemma does not warrant radically shifting our understanding of human cooperation. The IPD and other game theory constructs Read More

A Minor Post, Altruism, Cooperation, Evolutionary Modeling, Fluidity of Knowledge, Game Theory, Reciprocity, Web

Larry Arnhart on Singer, Bowles, and Gintis and Darwinian libertarianism

Posted 28 Jun 2012 / 0

Darwinian Conservatism “Does Strong Reciprocity Support a Darwinian Left?” This is a really interesting comparison of the “utopian” and “realist” versions of leftist politics, and of the struggle of thinkers like Singer. What I think needs to be kept in mind is that all these folks are doing more than just trying to produce science Read More

A Minor Post, Cooperation, Evolutionary Modeling, Punishment, Reciprocity, Social Norms

Familiarity breeds… mutual aid (at least in some birds)

Posted 21 Jun 2012 / 0

Biology Letters “Long-term familiarity promotes joining in neighbour nest defence“

A Minor Post, Articles, Birds, Cooperation, Reciprocity, Social Networks

Scientific American “Why We Help”

Posted 21 Jun 2012 / 1

The July issue of Scientific American features a cover story written by Martin A. Nowak called “Why We Help“. This very short article contains a brief review of Nowak’s “five rules” for cooperation, a little bit of connection to experimental work in real organisms, and some hazy conjecture concerning what makes humans cooperate. It seems as Read More

A Major Post, Anthropogenic Change, Articles, Behavior, Climate Change, Cooperation, Evolution, Evolutionary Modeling, Game Theory, Group Selection, Human Evolution, Human Nature, Kin Selection, Punishment, Reciprocity, Social Networks

PNAS paper explores the role of population structure in facilitating reciprocity

Posted 12 Jun 2012 / 3

The “Early Edition” of the Proceedings of the National Academy of Sciences of the United States of America just posted online a paper entitled “Direct reciprocity in structured populations“. Authored by Matthijs van Veelen, Julián García, David G. Rand, and Martin A. Nowak, the paper combines two well-explored factors that influence how cooperation evolves: repeated Read More

Articles, Behavior, Cooperation, Evolutionary Modeling, Information Design, Reciprocity, Social Networks

Martin Nowak and Roger Highfield’s “SuperCooperators”

Posted 03 Nov 2011 / 0

Martin Nowak has accomplished a lot for a mid-career scientist. His theoretical work exploring how cooperation evolves has illuminated the importance of a great number of evolutionary mechanisms. He has also been unafraid to tackle real-life problems of cooperation, including questions like “why do we get cancer?” and “how did language evolve?”. Nowak likes to Read More

Altruism, Books, Cooperation, Cultural Evolution, Ethics, Evolutionary Modeling, Game Theory, Group Selection, History, Human Evolution, Human Nature, Kin Selection, Language Evolution, Multilevel Selection, Mutualism, Punishment, Reciprocity, Religion, Superorganisms, Sustainability

Howard Rheingold TED talk urges a global movement to study cooperation

Posted 21 Oct 2011 / 1

A few weeks ago I posted an aside about Howard Rheingold’s 6-week online course on cooperation theory. One of my questions about the course regarded how to assess Rheingold’s credentials to teach the course: he is not sanctioned by any university (although he does call what he does — modestly — “Rheingold U”), and there Read More

Altruism, Cooperation, Cultural Evolution, Evolution, Game Theory, Group Selection, Mutualism, Punishment, Reciprocity, Talks & Seminars, Web

Costly signalling not so costly in the presence of comrades

Posted 23 Sep 2011 / 0

This month’s issue of PLoS Computational Biology contained an interesting article entitled “Signalling and the Evolution of Cooperative Foraging in Dynamic Environments“. Authored by Colin J. Torney, Andrew Berdahl, Iain D. Couzin (all of Princeton University), the article seeks to understand the ecological conditions under which costly signaling can evolve. Many animals emit signals to Read More

Altruism, Articles, Cooperation, Game Theory, Group Selection, Individual-based Models, Modeling (General), Reciprocity, Spatially Explicit Modeling