A Modest Proposal: Limiting the Franchise

[Lemur]

The earliest I've heard was 40,000, and the latest 10,000. I might have read that in an aged book (many of my history books are old things, bought from old peoples' flea markets and garage sales), but if you have some supporting evidence, I'd be willing to re-check my source(s).

Gonna make this a quickie so I don't permanently derail my own thread (although it looks as though CR isn't going to respond in defense of his thesis, so I guess this topic's done for anyway):

Source: A new study published November 26, 2007 (see PLoS Genetics), which was led by University of Michigan and University College London researchers, seems to suggest that the Bering land bridge migration occurred during one specific time period which was 12,000 years ago, that every human who migrated across the land bridge all came from Eastern Siberia during that time period, and that every native American is directly descended from that same group of Eastern Siberian migrants. The claim suggests that a "unique genetic variant widespread in natives across both continents - suggesting that the first humans in the Americas came in a single migration or multiple waves from a single source, not in waves of migrations from different sources".