This is an interesting criticism of the Bleeding Heart Libertarians by an Objectivist philosopher and historian of science.I consider the essay must reading for every libertarian. It provides essential background material on how the developing trends in libertarianism fit into the history of libertarian thought, and it provides updates on important players currently operating in the greater libertarian distortion field.
Most shocking to me was the revelation by McCaskey that Brink Lindsey, a spear carrier for social justice libertarianism, who was booted from the Cato Institute, is now back at Cato as, get this, the Vice President for Research.
I hasten to add that while I consider the historical context and detail provided by McCaskey extremely important. His concluding paragraphs, that attempt to defend pure libertarianism, are very weak. The defense could have been much stronger. Indeed, his use of a grandchildren analogy leaves me completely baffled.
The paper is here.