What factors were leading in the evolution of the first modern humans?

Human evolution was not influenced more by external factors, but by the development of the brain. It was the developed hemispheres of the brain that became the cause of human evolution. This allowed a person to adapt to various living conditions, and most importantly, to survive. Global cold snaps could destroy human ancestors, but the ability to make fire and use animal skins as clothing and insulation of overnight stays essentially saved them from extinction. All thanks to developed thinking. Cooling, warming and other changes did not particularly affect the external changes in human ancestors.