Thats true but a mutation in wolves may be the beginning of dog breeding.
Friendliness and cooperation are at the heart of building projects be they neolithic or more complex architecture. We know homo sapiens by their buildings. I speculate some other human species are still in our chromosomes deep down like the Neanderthals. Not that short people are related to Hobbits but certain disease models may be related to archaic species.
The great mysteries still remain of how certain great stones were moved and manipulated.