such tepid extrication , if widespread in mens lives and done by the majority of human denizens on this planet ( aristotle reminding us one swallow does not make for a summer , nor does one day ; and so too one day , or a short time , does not make a man blessed and happy48 ) when the conditions of material existence allow for it , would be a catalyst to the human species which , in behavior , has been stagnant for hundreds of thousands of years .