You see Brian. When an egg is fertilised, it begins as 'one' - but then splits into many.
Sapiens may have been 'one' longer ago when they only numbered about 10,000 or less (the bottleneck), but the Sapien journey is for them to split into many 'different' cells around the world - this creates genetic diversity and from that diversity comes the 'oneness' again but through another step up process.
This is how DNA works - it joins, it splits and so on.
So the Sapien, in its small population was 'one'.
Then as is happening now - it is splitting and has already split, with the European races splitting into four distinct and the already split Yellows, Blacks merging in another region of the world, etc.
The Euro mix splitting out into the world as Blue, Red, White and Grey (Northern, Western, Eastern and Southern European foundations).
While the Browns, Greens, Yellows and Blacks merge from their isolated backgrounds.
But of these 8 Races that will each have a representation in each of the 8 habitable Regions (because 'Equality' always rules) - there is the 9th (like the mysterious 9th planet) race of all those who are 'mixed' from all - the Purple People. They are the 'cement' that binds all the different bricks.
I can go on more about this, as I have studied Racism, Culturalism and all the other isms involved. I wouldn't have been able to see the 'true' Oneness of it all, without understanding the 'differences' of it all in the first place - for BOTH exist 'equally' in accordance.
There is One God, but there are Many Gods too.
There is One Star, but there are Many Stars too.
Next time Brian, use 'both' sides of your brain before you open your yawning trap like a 'half'wit you are.