Is there a trend towards global innovation or it is a few countries that represent global innovation?

Yes. We see more number of countries contributing to ideas impacting society. However, we find the maximum number of ideas still come from the United States (US). There could be some good reasons for this. In my opinion it seems there exist a certain conditions prevailing in the US. Like- the quality of academics is top class, abundance of qualified people, a more diverse culture (US is known as the land of the immigrants), research funding are good from government as well as corporate, innovation-ecosystem already exists risk, talent is well rewarded, people from other countries feel welcome to develop their intellectual capacity. Einstein’s story is a good example. He fled from Germany which was Nazi dominated to avoid prosecution and went to US. He took to US citizenship for the love of his work that he could nurture better in US than in Germany. These are good inputs for many aspiring countries if they want to become a nation known for innovation and also if we need to make innovations a global phenomena.