I know little about Kennewick Man apart from what I have read on the web; however, in a neolithic tomb on Orkney built around 3,000 BC of the remains of some 342 individuals (probably covering several generations) some were found to have abnormalities that would indicate a severe genetic disability in the population probably resulting in blindness and deafness etc.

Nevertheless these individuals lived to the same adult age as their contempories showing that even these (primitive, by our standards) ancestors had care and concern for those in their community not so fortunate as themselves.

Like many people who have posted here, as a European, I find it hard to comprehend why the most powerful and wealthy nation at this time can't or simply won't extend such universal care to its community.