Tesla refers to several different entities, but the most common reference is to Nikola Tesla, a renowned inventor, electrical engineer, mechanical engineer, and futurist who lived from 1856 to 1943...

Joseph Stalin, born Ioseb Besarionis dze Jughashvili (1878-1953), was a Soviet politician and dictator who ruled the Soviet Union from the mid-1920s until his death in 1953. He played a key role in...

Karl Marx was a German philosopher, economist, historian, political theorist, and revolutionary socialist who lived from 1818 to 1883. He is best known for his influential works on economics...

A social activist is someone who works actively to bring about social or political change. They are typically motivated by a desire to improve the lives of others or to address issues such as...