Reading A Different Flesh by H arry Turtledove. Good alternative history starten out with the idea that homo erectus crossed the landbridge to americas instead of homo sapiens. No native societies ever arose. What would the effect om history be? Curious creatures there would be because erectus was not as good at extinction as we were, No gold treasures though that made spain the richest and most powerful country in europe. And the animals like mammoth, sabertooth, giant ground sloth and several others would still be alive to see. Not to speak of erectus. Would that make some humans mind turn to evulutionary thoughts earlier when they had live examples to go from? It starts with the first english colony and continues through the centuries. I am at the beginning of the railroad now. Good story ut Turtledove is often interesting.