Generally scenarios I've seen on there being no Second World War have been "Pre War World Aeternum" or have been negative in ways. Things like no (or a seriously delayed) Civil Rights movement, Imperialism never falling, technology being seriously slowed in progression, the Depression continuing on for much longer and the New Deal potentially even falling apart from failure and/or resurgent Conservative opposition, etc. I don't tend to believe in that school of thought, and I think it is too simplistic in it's thinking and assumptions.
So I wanted to create a discussion to try to discover as close to realism as possible how the world would be and what things would follow if there were no Second World War.