Compromise, if any even could be found, seems to be an alien idea.

This is my land and I'll have no alien ideas parading across it.

The alien ideas were either valid or they weren't.

It is bad enough for a believer in any faith to have the content of his belief infiltrated by alien ideas.

But these days, corporate life is so comfortable that risk-taking is an alien idea.

It is not an alien idea in Iraq.

You have clearly been influenced by alien ideas in England, and your behavior is a disgrace.

They were only gradually allowed in other cities, so as to prevent the spread of alien ideas to the general population.

All of these "alien" ideas are actually represented on earth anyway, so don't let your skepticism turn you away.

To most whites in 1964, integration was as alien an idea as Marxism.