But the geographical time-frame with the Pangea Descendant is hugely larger than that needed to diversify a specied of monkeys. And we must also have some sort of mechanism that sees to that NO monkey gets down the tree faster than the others, because you know what happens to dumb monkies when the smart monkies come around. We're talking Neanderthals here. Big ones. In heaps and heaps, without heads.
The window of different species having the same intelligence is very unlikely. We'd need humans to first evolve intelligence, and then have that Pan Sapiens diverisfy into shorties, tallies, leatheries and wateries in a very short time, to be ready for inevitable rise of agriculture, cities and civilisation. Different worlds WOULD come handy in this - we can play along with time and space, and let the different species come together when they're relatively balanced. And, more importantly, other worlds offer the same opportunities as islands or other continents, without the risk of being disturbed and such, in the evolutionary process. A small group of humanoids travelling to another world can easily spawn a genetically diverse subspecies that grows large if it is left alone - but when that species has grown enough, and contacts are held in the other world to share genes, the population will stabilise and keep large groups of humans pretty similar, if there's no more settling and diversifying in those other worlds. |