 Mesolithic (post-LGM) populations had diverged significantly due to their relative isolation over several millennia, due to the harsh selection pressures during the LGM, and due to the founder effects caused by the rapid expansion from LGM refugia in the beginning Mesolithic.By the end of the LGM, around 19 to 11 ka, the familiar varieties of Eurasian phenotypes had emerged.However, the lineage of Mesolithic hunter-gatherers of Western Europe (WHG) does not survive as a majority contribution in any modern population.