Without getting into PoD's and how it happen, let's just assume this is how the world is:
World War 2 ended with Germany defeated but still kept intact its original land but kept Austria and National Socialism still survives as state idealogy and so does Hitler.
The USSR still survives and is slightly more powerful than the US, but not by much - both know they could wipe eachother out and won't risk a war, but the USSR is the worlds leading power but not by much.
The Nationalists won in the Chinese civil war and have close ties with Japan, united Korea and the Philippines attempting to create a third power to challenge the USSR and the US.
The UK fell apart during WW2 when Scotland and Wales declared independance and Ireland took the oppertunity to invade the north when the British army was completely flattened by Germany.
Mexico is much more industrialised and truely democracy and is a leading light for South America to achieve the same, a bit on par with OTL's Canada.