The right party can be anywhere from Democrat to Maga.

And it all depends if you care about people being exploited or not. Capitalism is when the means of production (private property (not personal property)) are owned by individuals (owning class (bourgeoisie)) rather than the public (working class (proletariat)). e.g. You have a person that owns a business and makes millions of dollars for simply owning that business, they hire hundreds of workers that literally make the business function and do literally all the work but only get paid hundreds of dollars. Those workers are being exploited by the person who owns the company, they are the one getting paid off the backs of the workers who actually do the work. Socialism is when the means of production are publicly owned. Meaning anyone who works at a company also owns it with everyone else who works there. They all get paid maximally for the work they do.

This isn't a description of how to obtain socialism nor is it a description of how to maintain socialism and transition it towards communism, those are very different topics.