" Hundreds of thousands of years ago our ancestors of the dim and distant past faced the same problems which we must face, possibly in these same primeval forests. That we are here today evidences their victory. What they did may we not do? And even better, for are we not armed with ages of superior knowledge, and have we not the means of protection, defense, and sustenance which science has given us, but of which they were totally ignorant? What they accomplished, Alice, with instruments and weapons of stone and bone, surely that may we accomplish also. "