Lord Keynes — What Determines Profits in Neoclassical Theory?

Important now in relation to Peter Thiel's monopoly theory of the entrepreneur versus commodity producer, where commodity producers compete profit away but savvy entrepreneurs that dominate their niche can extract economic rents. Thiel cites neoclassical profit theory to prove his point. 

Thom Lambert, Wall Chair in Corporate Law and Governance at the University of Missouri School of Law, explains in Peter Thiel on the Virtues of Monopoly that the neoclassical model is so 19th century. Now we realize that successful capitalism is based on monopoly rather than competition. So those anti-trust laws are so 19th century too. Government has finally come around to support monopoly capitalism institutionally. 

And it goes with out saying that entrepreneurial incentive is unlimited wealth extraction. So wealth and income inequality is virtuous. QED.

Social Democracy For The 21St Century: A Post Keynesian Perspective
What Determines Profits in Neoclassical Theory?
Lord Keynes