The Song Dynasty practiced Buddhism whereas the Tang banned the religion and persecuted those who followed it during the later time of their ruling. The Tang Dynasty also had expanded their empire and even reformed civil service. The Tang expanded and conserved their power by establishing tributary states. They had a stronger more powerful military when compared to the Song. The Song Dynasty ruled a smaller empire during their time that primarily relied on sea power. Their military power was weaker than what the Tang Dynasty’s was.
To answer your first question, social darwinism is a theory that supports the rich getting richer. Republican party is based around this theory. Since they believe that those who are the fittest get the money, there is no reason to help the poor, because that is their fault. We can also attach to this the theory of mercantilism where everyone get what they truly deserve. On the other hand, social gospel movement is a christian movement that wanted to help the poor based on christian values. This movement applied christian ethics to social problems such as poverty, delinquency, racism, child labor and so on.
He had a well-shaped head - not the "bullet" type of many pugilists - and dark hair which was turning gray. He carried this head at a proud angle which gave emphasis to his prominent jaw. His face was somewhat florid, so that even without knowing who he was, on would have said "Here is a man who has been a hard drinker." He had a fine mustache in the old tradition. Starting below his nostrils this mustache, a few shades grayer than his hair, extended in leisurely fashion over his lip and all the way across his face on both sides. The under edges were a trifle ragged and the curl at the ends was upward. He had a custom of snorting sometimes, as he was about to say something, after which he would stroke his mustache, first on one side, then on the other. I got the idea that this stroking business acted as a sedative on him. . . .
He talked with a perceptible, but not pronounced, brogue. When he became excited, however, this brogue grow thicker. He made small errors in grammar, which stamped him as a man of little education, but remembering how brief his education really was, one had to admit that he talked remarkably well. . . .
"Well, there's nothing to fighting, " he opened up, "Just come out fast from your corner, hit the other fellow as hard as you can and hit him first. That's all there is to fighting."
He laughed, then at once grew serious.
"What I should like to talk about is something else. Whiskey! There's the only fighter that ever really licked old John L. Jim Corbett, according to the record, knocked me out in New Orleans in 1892, but he only gave the finishing touches to what whiskey had already done to me. If I had met Jim Corbett before whiskey got me I'd have killed him. I stopped drinking long ago, but of course, too late. Too late for old John L., but not too late for millions of boys who are starting out to follow the same road
In the first few years of World War II, both sides of the war were mainly stuck in stalemate, which is like a draw neither side was gaining or losing much ground, but I'm sure as you can probably imagine it was still a gruesome war with lots of bloodsheds, injuries, and casualties, but both sides continued to try and outsmart the other side in the great war, but as stated before they were mainly stuck at stalemate in the first few years. Hope this helps :-).