" The intrusion of private property into these settings, generally inspired by economists who don’t understand the logic of the context (and love private ownership), has often been a disaster.9 It also suggests a selfish reason for why people in villages often seem to help each other out; it is probably partly in anticipation of receiving similar help when they need it.10 The punishment sustaining the norm is that those who refuse to help will themselves be excluded from the community’s help in the future. "

― Abhijit V. Banerjee , Good Economics for Hard Times: Better Answers to Our Biggest Problems