The only point I am making is not, as you assume, that all of our philosophy and knowledge is useless, nor that no part can be separated from the whole.

My point is that we don't know which part is useful and which part isn't, and to presume otherwise -- ie to believe that we can effectively, if you will, "play God" with some future society after we've blown this one up -- is hubris (not to mention likely contraindicated in the Bible somewhere).