Hi, I'm currently drafting an essay
I think you can consider the prompt question to mean now, and in the future. Are there not some aspects of this "full knowledge obtained" that you can use NOW, in your present community. You could look up the local paper online, and see what kind of problems, and situations exist locally.
Then you could look up by googling, what volunteer organizations exist to solve or deal with that problem, locally. Another thought is to contact your local Congressperson, or Senator, and ask what needs help in your current community. Perhaps you can even volunteer with their offices.
Once you've given back to the community (pay forward) to the local scene, then you can turn your thought to your home country. I think that would take care of the proper order.
ef_Carol