In short, you can't let the deadline define the mission. The mission has to define the duration.

If a country denies it has AIDS, that country will inevitably become an even greater victim.

United Nations peacekeepers are going all over the world spreading AIDS even while they're trying to bring peace. What a supreme irony.

You have to test your hypothesis against other theories. Certainty in the face of complex situations is very dangerous.

World War I was not inevitable, as many historians say. It could have been avoided, and it was a diplomatically botched negotiation.