He was a socialist way before that. He decided to join the CPUSA late in life. He didn't just suddenly flip from saint to communist. His entire life was that of a socialist activist. And socialism is just communism for people who don't want to be called communists.
From his book:
"The world-old phenomenon of the contact of diverse races of men is to have new exemplification during the new century. Indeed, the characteristic of our age is the contact of European civilization with the world's undeveloped peoples. Whatever we may say of the results of such contact in the past, it certainly forms a chapter in human action not pleasant to look back upon. War, murder, slavery, extermination, and debauchery,—this has again and again been the result of carrying civilization and the blessed gospel to the isles of the sea and the heathen without the law. Nor does it altogether satisfy the conscience of the modern world to be told complacently that all this has been right and proper, the fated triumph of strength over weakness, of righteousness over evil, of superiors over inferiors. It would certainly be soothing if one could readily believe all this; and yet there are too many ugly facts for everything to be thus easily explained away. We feel and know that there are many delicate differences in race psychology, numberless changes that our crude social measurements are not yet able to follow minutely, which explain much of history and social development. At the same time, too, we know that these considerations have never adequately explained or excused the triumph of brute force and cunning over weakness and innocence."
And there it is, in full flower - the myth of progressivism, Marxism, socialism, and "modern sociology". The evil White Christian Man has brought untold suffering, misery, debauchery, extermination, and slavery to the po' peoples of da colour throughout the world. Is this true? Or is this a lie?
It's a lie.
The "savages" were called that for a reason, and it wasn't because they didn't speak a Germanic or Romance language. Human sacrifice, ritual torture, every conceivable depravity known to man, were routine staples of their "societies". The very concepts of oaths, and honour, were (and largely still are) missing in the Wakandas of the world. Technological progress, you know, the kind that feeds those who would otherwise die before the 12th month, was brought to the "undeveloped peoples" of the world. And let's ask, why are they known as "undeveloped" in the first place? Was Da Man keeping them down for millennia? Hardly.
The colonial experience in Africa is a case in point. Anyone who actually looks at the history of Europe's African colonies can see that western, Christian, colonialisation was a gift from heaven. A gift which has been despised and squandered and, since the 1950s and the agitation of Communist class struggle revolutionaries and "liberators", a gift which has been rejected. Rhodesia, anyone? Zaire? Central African Republic?
I'm not saying any particular author should not be read. On the contrary, I think everyone should read just about everything. But to claim an author's work is a "seminal" work that ought to be mandatory reading,
implies you support his ideas. Which if that is the case, then you, sir, are part of the world's problem, and not the solution.