off topic. How important is the survival of the human race? w/survey

This has nothing to do with politics.

If there were a natural disaster and there were only 2 people left.  A man and a woman.

How important to you would it be for them to have offspring?

Or another way of putting it - would preserving their lives be more important than the lives of any of the people that died previously.
update: if you think it is a stupid question, please tell me why.