It could unfold in different directions, but one possible outcome could be Cold War between Third Reich from Calais to Vladivostok and from Murmansk to Basra and USA/Great Britain/Latin America alliance. You see, more benevolent leadership will likely result in less industrial capacity for USSR in 1941. Taking into account that Nazi rise to power owns as much to fears of Red Coup inside as to fears of Red Wave from outside, Hitler faces weakened Soviet Union and wins. Fall of the USSR will trigger a chain reaction of whole Eurasia (with possible exception of India) falling into Axis hands.