[Wonder Warthog]

"It is abundantly clear to any reasonable observer that there may have once been races of humans but now there is only one, the human race."

DNA says you are wrong. There is unquestionably more people that are "mixed-race" than ever before, but it will be hundreds of years before humanity is sufficiently genetically "homogenized" to be considered a single race, if ever.

[Smartaleck]

"but it will be hundreds of years before humanity is sufficiently genetically "homogenized" to be considered a single race, if ever."

Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same in all people.
http://ghr.nlm.nih.gov/info=basics/show/dna

What percent do you think it will be?

[muir_redwoods]

DNA is exactly what says I'm right. We are one race and we have many ethnicities which are shifting conventions at best. We all have bits of virtually every ethnicity out there and there is not a person alive who can vouch for his great, great grandmothers morals. No one knows his own ethnic make up with certainty. One might present characteristics of a caucasian Eurpoean but that appearance doesn't tell the whole story by a long shot. By what standard would a "Race" exist?

It's been centuries since populations were sufficiently isolated in any significant numbers to be called "ethnically pure" whatever that might mean.