Define social darwinism. how did some imperialists make use of this concept?

Social Darwinism is a term used for ideologies which exploited ideas of survival of the fittest.To elitists strong nations were composed of white people who were successful at expanding their empires, and would survive in the struggle for dominance.

This is what i found on google “the first mobile phone call was made 40 years ago today. on april 3, 1973, motorola employee martin cooper stood in midtown manhattan and placed a call to the headquarters of bell labs in new jersey.” i hope this you for what your looking.