To win socialism — a society democratically owned and run by and for the majority of people — we have to get rid of the capitalist system that stands in our way.
But who is going to do this? The capitalists aren’t going to give up their privileges.
It's those who are exploited and oppressed by the system that have an interest in changing it.
Capitalism can't permanently satisfy the needs of the majority — the working class, farmers, women, ethnic and racial minorities and so on.