Glad it is not a mud slinging excercise. Here is what I think England (UK)has done for the world (I am sure other nations have helped in some ways though)

Democracy
Religious tolerance
Administration
Education
Medical leads (at all levels)
Shakespeare
Keats
Alexander Grahame Bell
Industrial Revolution
Florence Nightingale
Churchill
Fish and Chips
Bacon Buttys
Proper beer
Black pudding
Rolls Royce
Jaguar
At one time, ship building
Etc etc

I could go on and on but ALL countries have added to world history and we should all be proud of that!