I see you've made a self referential comment there because it's pretty obvious you are one of those people given prior ignorant statements you've made in this very thread.
You are the one who tried to define socialism and come up with a reductive definition. The wikipedia page on socialism covers the broad aspects of socialism and its history.
I did not come up with a reductive definition, and I linked you a detailed explanation of what socialism actually is and its relation to communism. You never addressed that, and just continued to spam your wiki link. You're like a poster child for the Dunning-Kruger effect.
Wikipedia is a good source for history. The page on socialism contains the major key events and enough cross links, the history section for example redirects to https://en.wikipedia.org/wiki/History_of_socialism