From Human Action — surrounding passage

The result of their activities is then 24 p + 60 q, which, as p has for A a substitution ratio of 3/2 q and for B one of 5/4 .q, signifies a larger output than 32 p + 45 q. Therefore it is manifest that the division of labor brings advantages to all who take part in it.

“Collaboration of the more talented, more able, and more industrious with the less talented, less able, and less industrious results in benefit for both. The gains derived from the division of labor are always mutual.”

The law of association makes us comprehend the tendencies which resulted in the progressive intensification of human cooperation. We conceive what incentive induced people not to consider themselves simply as rivals in a struggle for the appropriation of the limited supply of means of subsistence made available by nature. We realize what has impelled them and permanently impels them to consort with one another for the sake of cooperation.