Science ... looks skeptically at all claims to knowledge, old and new. It teaches not blind obedience to those in authority but to vigorous debate, and in many respects that's the secret of its success.
After 9/11, we had to look at the world differently. After 9/11, we had to recognize that when we saw a threat, we must take it seriously before it comes to hurt us. In the old days we'd see a threat, and we could deal with it if we felt like it or not. But 9/11 changed it all.
If you want to understand the causes that existed in the past, look at the results as they are manifested in the present. And if you want to understand what results will be manifested in the future, look at the causes that exist in the present.