Individuals cooperate more with others to whom they feel connected. As a consequence, reduced belonging an in-group decreases cooperation this group, but not others. Sometimes, however, there may be no new group available (re)affiliate with. In case, either increase on higher level, such as the superordinate humanity, or selfishness. We investigate in online experiment and survey study. Study 1...

Do Women Supply more Public Goods than Men? Preliminary Experimental Evidence from Matrilineal and Patriarchal Societies Steffen Andersen, Erwin Bulte, Uri Gneezy and John A. List Some 35 years ago the Club of Rome published a book that sold more than 30 million copies across 30 different translations (Donella Meadows et al. 1972). The book predicted the collapse of modern society if population...

Lack of information is a constraint but ignorance can sometimes assist the evolution of cooperation by constraining selfishness. We discuss examples involving both ignorance of role or pay-off and ignorance of relatedness. Ignorance can favour cooperative traits like grouping and warning coloration and reduce conflicts from meiotic drive, imprinting, greenbeards and various forms of nepotism.

Spite involves harming others without good reasons. It may survive in small populations or on markets with strategic substitutes. We consider situations where selfishness helps efficiency. Here spite endangers efficiency, but is wiped out by evolutionary forces.  2000 Elsevier Science S.A. All rights reserved.

Selfishness and altruism are two concepts of paradoxical nature. Examination these according to individuals cultures may provide a better understanding the structure in question. In this study, it was aimed adapt Healthy Pathological Altruism Scale (Kaufman & Jauk, 2020) into Turkish conduct validity reliability study. Before proceeding main study conducted with group 122 (84 women 38 m...