Of course, the reader might argue that I was as stubborn in my viewpoint as they were in theirs. Yes, indeed, but I was right and they were wrong and… - Isaac Asimov

What, then, of human activities? Is humankind itself hastening its own end? Man has, for instance, been burning carbon-containing fuel — wood, coal, oil, gas — at a steadily accelerating rate. All these fuels form carbon dioxide. Some is absorbed by plants and the oceans but not as fast as it is produced. This means the carbon dioxide content of the air is going up — slightly but nevertheless up. Carbon dioxide retains heat, and even a small rise means a warming of the Earth's atmosphere. This may result in the melting of the polar ice caps with unusual speed, flooding the world before we have learned climate control. In reverse, our industrial civilization is making our atmosphere dustier so that it reflects more sunlight away and cools the Earth slightly — thus making possible a glacial advance in a few centuries, also before we have learned climate control.

La humanidad ha perdido todo control sobre su futuro
-No lo ha tenido jamás, en realidad.Estuvo siempre a merced de unas fuerzas económicas y sociológicas que no entendía, de los caprichos del clima y de los azares de la guerra.

La psicohistoria era la quintaesencia de la sociología; era la ciencia de la conducta humana reducida a ecuaciones matemáticas.