A socialist is someone who supports the political philosophy of socialism, which is a governmental system that advocates community ownership and control of all lands and businesses rather than individual ownership.
The Latin word socius meant "companion," and led to the Old French word social, from which the word socialist derived. However, the meaning came to be so much more than just "associate." As opposed to a capitalist, a socialist advocates a society based on cooperation rather than competition . Winston Churchill once said, “It is a socialist idea that making profits is a vice; I consider the real vice is making losses."