The great economist Joseph Schumpeter wrote that “[F]ree trade is the cement that holds together the idea of peace.”*
His logic is sound. To put it bluntly, killing the customer is bad for business. And money talks. Commerce gives people who may hate each other a powerful incentive to get along; greed can be a force for good.
*Thomas K. McCraw, Prophet of Innovation: Joseph Schumpeter and Creative Destruction, (Cambridge, MA: Harvard University Press, 2007), p. 110.