People of european descent have Neanderthal and Denisovan DNA corruption.  That's why the european gene pool has over 6,000 disease carrying recessive genes. The european birth rate is the lowest of all and they have the highest rate of birth defects and miscarriages.  They suffer the most from heritable diseases linked to DNA. They also suffer the most from Schizophrenia, Alzheimer's, and other diseases which destroy the mind.