You mean you are on this forum and don’t know how to use google?
Socialism is a political system where the community supposedly owns everything and it’s government controls all business and means of production and distribution. There is no private business. It is also based on the belief that all people should share equally in a countries wealth.
There are no political parties in this country that come close to ascribing to socialism. A capitalistic form of government with a few social programs such as Social Security, Medicare, Medicaid or various welfare programs is not socialism. They are programs designed to PREVENT a country from resorting to socialism.
It is true that most socialistic countries start out as capitalistic. Pure capitalism will never survive and inevitably leads to all the wealth in the hands of very few and the majority living in poverty. That majority will only put up with that shit for just so long before they stand up and use force to balance things out (usually socialism).
Therefore, programs designed to prevent that migration of wealth into the hands of very few and programs designed to prevent or help those out of poverty are essential in a capitalistic country or it will never survive. Poverty is the single largest enemy of a Capitalistic country. The hard right or libertarian philosophy of work hard or fuck you starve, is the quickest way for poverty to sky rocket and your capitalistic country to fall. It is why if you really want a socialistic country, vote Republican, because that is the quickest way to get one.