Human evolution refers to the evolutionary process leading up to the appearance of modern humans. While it began with the last common ancestor of all life, the topic usually covers only the evolutionary history of primates, in particular the genus Homo, and the emergence of Homosapiens as a distinct species of hominids (or "great apes"). The study of human evolution involves many scientific disciplines, including physical anthropology, primatology, archaeology, linguistics, evolutionary psychology, embryology and genetics.
Within YMRP, Humans are how they are within any video game, movie, book. But, the people of YMRP are from a world where nuclear explosions had cause most of the world to be rid of the humans within it. The humans born now out of a new form of 'human' for say. People began to grow abnormal abilities with the aftershock of the war causing people to gain an odd gene within there off springs due to being so exposed to the explosions and nuclear radiations. Soon after a gene was discovered, a rare mutation in human beings. This ostensibly named "Omega gene" is naturally occurring. Those with the Omega gene usually have no powers or abilities at birth and may live their whole lives without realizing what they are, with few ways of identifying Omega potential. There are rare exceptions to this, but these demonstrated abilities are minor. The gene was a distinctive part of the human anatomy, and can only be seen by a select few through blood testing.
Usually when the Omega gene first surfaces it comes out with the abnormal abilities of peak human qualities. Every child born after the WW3 has this gene which is why Chi users have become so powerful, also why peoples intelligence has increased on a level that they are able to do feats that were far beyond there ancestor’s abilities.
Please take note that WITHOUT the omega gene, you cannot have any form of powers, abilites, or peak human traits, it is a universal thing within the YMRP lore.