What is social Darwinism and how does it support imperialism

Social Darwinism is a famous theory in sociology that was patterned after Darwin’s theory of evolution. This theory allows people to move up and down the social ladder depending on what they have achieved in order to gain their social status. Social Darwinism had promoted laissez-fare, a market system where markets are allowed to trade freely with other markets, which was taken from imperialism and capitalism