The world has basically settled on mixed economies being the best possible system. The debate is now really about what the mix should be.

We've collectively decided healthcare should be public-owned, the US is just the one dissenting voice that hasn't yet fully switched over yet. We've also decided that food production, distribution and sales should be largely capitalist, but with socialist supports for the production because food production is too essential to be allowed to fail completely. We've decided that research into medicine and drugs should have both private and public components, but that the government must investigate and regulate any new things, so we don't get tricksters selling snake oil.

No society is seriously considering a fully socialist or fully capitalist system because it's clear how badly they fail. But, disputes over just how much socialism is too much or too little will go on for a long time.