All states are socialist. Forcible transfer of wealth is state socialism. I haven't seen a modern state that does not use the forcible transfer of wealth in its funding schemes, so I have not seen a modern state that is not socialist. All of these modern socialist states are only different by degrees: the degree to which they are willing to steal from people, and the degree to which they restrict people's freedoms.

If you want to demonstrate non-state, 100% voluntary, large-scale socialism, I would love to see it tried.