#exchange

Reciprocity is the principle that people feel obligated to return favors.

From Influence: The Psychology of Persuasion by Robert Cialdini

Innovation thrives on the exchange of ideas and experiences.

From The Dream Machine: J.C.R. Licklider and the Revolution That Made Computing Personal by M. Mitchell Waldrop

We have always been a species that thrives on exchange.

From The Rational Optimist by Matt Ridley

We need to create spaces that allow for the free exchange of ideas.

From Where Good Ideas Come From by Steven Johnson