[whereasandsoforth]

Sorry, race has to be biological. There are distinct differences in the bone structure (between some races), and there are illnesses that one race gets and the others don't (I know there are exceptions). I'd call that biological.

[Modernman]

Sorry, race has to be biological

The concept of race is purely man-made. From a biological point of view, there is no more difference between a white person and an asian person than there is between a white house cat and a black house cat.

There are distinct differences in the bone structure (between some races)

The differences in bone structure among members of the same "race" are just as great as the differences in bone structure between races. Now, if one race had extra bones, you might have an argument....

there are illnesses that one race gets and the others don't (I know there are exceptions). I'd call that biological

These are genetic disorders that have nothing to do with race. Sickle cell anemia is almost exclusively a disease suffered by black people. However, if whites and blacks inter-marry, eventually you'll see white people with SSA (and there are probably already cases in America of white folks with SSA).

[OldEagle]

Sorry, race has to be biological

More significant (to your point) than skin color is the distinct variation of physical build among the races.

[Cronos]

there are illnesses that one race gets and the others don't

Nope, those are regional variations, not racial. Sickle cell anemia developed in areas prone to malaria.