Well, yeah, then anyone can compromise. A core belief of socialism is strong welfare programs. A core belief of Libertarianism is little to no welfare programs. Neither side can really compromise extensivly on that.
Can people effectivly compromise when their beliefs are directly challenging each others?
Forgive me for slightly changing the direction of the thread. I thought the OP out badly so I'm trying to salvage it.
Reality will make them compromise, or at the very least, it will compel one side to compromise with the other until there is a significant change in the balance of strength.
Do you think socialists or communists can ever compromise with a capitalist society, or vice versa? Or do you think that differences in principles will compel people to compete and continuously attempt to redraw the balance of power?