Mastering His Own Environment The cities of today look different from the jungles of our ancestors and we imagine that because the brain of man overcame the old menaces new ones have arisen to take their place. We longer fear extermination from cold. We turn on the heat. We are t afraid of the vast oceans which held our primitive forebears in thrall, but pass swiftly, safely and luxuriously over their surfaces. And soon we shall be breakfasting in New York and dining the same evening in San Francisco! Adapt or Die Who will win? Nature answers for you. She has said with awful and inexorable finality that, whether you are a blade of grass on the Nevada desert or a man in the streets of London, you can win only as you adapt yourself to your environment. Today our environmental problem consists largely of the other fellow. Only those who learn to adapt themselves to their fellows can win great or lasting rewards.