The flourishing of radical philosophy in Baron Thierry Holbach's Paris salon from the 1750s to the 1770s stands as a seminal event in Western history. Holbach's house was an international epicenter of revolutionary ideas and intellectual daring, bringing together such original minds as Denis Diderot, Laurence Sterne, David Hume, Adam Smith, Ferdinando Galiani, Horace Walpole, Benjamin Franklin, Guillaume Raynal, and Jean-Jacques Rousseau. In A Wicked...