Karl Marx and Friedrich Engels
Hugely important for some social libertarians and most social authoritarians significantly on the left. National leaders in the latter camp have generally attempted to make the state stronger, rather than work towards the Marxian principle that it should gradually wither away.
18th Century economist and philosopher Adam Smith wrote this first-ever masterpiece in political economy. A champion of the free market, Smith was nevertheless not as entirely laissez-faire as his fans on both the libertarian and authoritarian right often claim. They tend to ignore the “moral” side of his teachings, which are reflected in his distrust of the motivations of businessmen.
Hans J. Eysenck
He constructed a tough-tender axis to the political personality
… of the celebrated Frankfurt School blazed new trails in the investigation of prejudice