https://en.wikipedia.org/wiki/Two-stage_theory
>The revolution cannot pause here, however, and must remain "permanent" in the sense that it must seek worldwide revolution to avoid isolation and thus move towards international socialism.

I'm not sure I understand what he means. Why can't it stop there? If socialism can't stop and be self-sufficient without spreading then it's a very fragile thing. It has to be able to stop and have fixed borders, or the Muslims will jump in and trash things.