Capitalism is an economic and political system in which a country's trade and industry are controlled by private owners for profit, rather than by the state. An example is businesses being able to participate in free trade.
In this excerpt, Winston Churchill is maintaining <span>that the people of a country have a right to self-determination, although he was of course implying that they had others. </span>
Social class. Meaning how much money you have. The highest class had the most money, and the lowest class have almost no money.