Oppressed and oppressor class are the essence of class struggles throughout history, but under the capitalist mode of production it is the proletarian and bourgeois classes, so you can just say that (Bourgeois and Proletarians is the first chapter in the Manifesto).
I don't own property, and chances are, neither do you. A very small minority in society do. I'm willing to give my life for the revolution. I don't think history ends at capitalism.