A common reaction of someone caught in a Prisoner's Dilemma is that "there ought to be a law against this sort of thing."
In fact, getting out of Prisoner's Dilemmas is one of the primary functions of government: to make sure that when individuals do not have private incentives to cooperate, they will be required to do the socially useful thing anyway. Laws are passed to cause people to pay their taxes, not to steal, and to honor contracts with strangers. Each of these activities could be regarded as a giant Prisoner's Dilemma game with many players.
Chap. 7 : How to Promote Cooperation
The Evolution of Cooperation (1984; 2006)
“The best practical advice then is: try to maximize your expected payoff, which is the sum of all payoffs multiplied by probabilities.”
Part I, Chapter 2, Research Perspectives, p. 31.
The Art and Science of Negotiation (1982)
Help us to complete the source, original and additional information
Howard Raiffa 21
American academic 1924–2016Related quotes

http://www.popmonk.com/actors/leonardo-dicaprio/quotes-leonardo-dicaprio.htm
“Small kindnesses often, unintentionally, produce the biggest payoffs.”
Source: The Gift

1999 Berkshire Hathaway Annual Meeting, as quoted in "Why Won't Buffett Invest in Tech Stocks?" at Motley Fool (6 March 2000) http://www.fool.com/boringport/2000/boringport000306.htm
Chap. 3 : The Chronology of Cooperation
Proposition 2.
The Evolution of Cooperation (1984; 2006)

Source: Flatland: A Romance of Many Dimensions (1884), PART I: THIS WORLD, Chapter 12. Of the Doctrine of our Priests
Context: As to the doctrine of the Circles it may briefly be summed up in a single maxim, "Attend to your Configuration." Whether political, ecclesiastical, or moral, all their teaching has for its object the improvement of individual and collective Configuration — with special reference of course to the Configuration of the Circles, to which all other objects are subordinated.It is the merit of the Circles that they have effectually suppressed those ancient heresies which led men to waste energy and sympathy in the vain belief that conduct depends upon will, effort, training, encouragement, praise, or anything else but Configuration.

Source: https://www.dougengelbart.org/content/view/348/000/#annotations:AVM5A_shH9ZO4OKSlBtx