As Herbert Spencer was to point out in the following century, feudal serfs were required to turn over one-third of their produce to their overlord. T… - George H. Smith

Ironically perhaps, key elements in the Marxian criticism of differs little from a popular conservative complaint (though the same point is typically used for different purposes).

Christianity cannot erase man's need for pleasure, nor can it eradicate the various sources of pleasure. What it can do, however, and what it has been extremely effective in accomplishing, is to inculcate guilt in connection with pleasure. The pursuit of pleasure, when accompanied by guilt, becomes a means of perpetuating chronic guilt, and this serves to reinforce one's dependence on God. ** p. 308

It is clear that 'social Darwinism' and 'survival of the fittest' were intended by Obama to evoke feelings of fear and disgust. It is highly doubtful that Obama knows anything about the history of these ideas, and it is even more doubtful that he cares. A concern for truth is not the coin of the political realm.