Yes, without Britain, there would be no steam engine, steam trains, telephones, parliamentarism, modern constitutionalism, English as the lingua france, penicillin, end of the slave trade, ATMs, logarithms, Shakespeare, the theory of evolution and so much more.
In 1000 years, once we have gotten over neurotic jealously and third worlidsm, people will look at Britain with more admiration than we look at Ancient Greece today. It is quite evidently the greatest nation the world has ever seen. It's not even particularly close.