Suppose you had to write a paper on whether you thought military intervention in some other country was ever justified. What would you write?

Suppose you had to write a paper on whether you thought military intervention in some other country was ever justified.

What would you write? Do you believe there would ever be any situations under which resort to war would be justified? Knowing the destruction and loss of human life that would be involved, would it still be justified?

What if that country's rulers were killing members of certain ethnic groups in their own country? What if they were to develop weapons of mass destruction?