The mating preferences of the rich, highly educated and well-nourished could ultimately drive their separation into a genetically distinct group that no longer interbreeds with less fortunate human beings, according to Oliver Curry.

Dr Curry, a research associate in the Centre for Philosophy of Natural and Social Science of the London School of Economics, speculated that privileged humans might over tens of thousands of years evolve into a “gracile” subspecies, tall, thin, symmetrical, intelligent and creative. The rest would be shorter and stockier, with asymmetric features and lower intelligence, he said.

Dr Curry’s vision echoes that of H. G. Wells in The Time Machine. He envisaged a race of frail, privileged beings, the Eloi, living in a ruined city and coexisting uneasily with ape-like Morlocks who toil underground and are descended from the downtrodden workers of today.

Dr Curry also said that today’s concept of race would be gone by the year 3000, relationships between people with different skin colours producing a “coffee-colour” across all populations. With improvements in nutrition and medicine, people would routinely grow to 6ft 6in and live to the age of 120, he said. Genetic modification, cosmetic surgery and sexual selection — whereby mate preferences drive evolution — meant that people would tend to be better-looking than today.

Otherwise, humans will look much as they do now, with one exception: Dr Curry also suggested that increased reliance on processed food would make chewing less important, possibly resulting in less developed jaws and shorter chins. Ten thousand years from today this effect could be compounded as human faces grow more juvenile in appearance. This effect — neotony — is known from domestic animals: dogs resemble young versions of wild relatives such as wolves.

Dr Curry raised the worrying possibility that reliance on technology could erode social skills and even health. As deaths from genetic diseases such as cancer are prevented, the genes themselves might become more common, no longer being “weeded out” of the gene pool. Increased use of medicine as a means of treating disease could lead to the deterioration of the body’s immune system.

Dr Curry’s predictions were commissioned by the television channel Bravo to celebrate its 21st anniversary on air.

“The Bravo Evolution Report suggests that the future of man will be a story of the good, the bad and the ugly,” he said. “While science and technology have the potential to create an ideal habitat for humanity over the next millennium, there is the possibility of a genetic hangover due to an over-reliance on technology reducing our natural capacity to resist disease or get along with each other.

“After that, things could get ugly, with the possible emergence of genetic ‘haves’ and ‘have-nots’.”

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