Michael Kelly Mort Kondracke Ch. However, I happen to be able to smell gas escaping better than most people. On more than one occasion I have walked by someone's home, smelled gas and left a note on the door. A sense of smell is just one of innumerable things that can differ greatly from one person to the next. Moreover, many of these differences are essential to the survival and progress of the human race.
People have different vulnerabilities and resistances to a variety of diseases.
That is why one disease is unlikely to wipe out the human species, even in one place. An epidemic that sweeps through an area may leave some people dying like flies while others remain as healthy as horses. There are children who are years late in beginning to talk and yet who end up scoring over the 90th percentile on math tests. Individuals differ radically from one another in all sorts of skills, interests and talents. What all this means is that the capabilities of the human race vastly exceed the capabilities of even the brightest and the best individuals.