posted by Joanne .
the most significant thing to learn about the differences between social, political and economics systems in the world ???????
Hopefully you'll find what you need in some of the following websites:
Already was on your suggested sites...don't think you can help me on this one...Thank you for trying
"the most significant thing" -- those words indicate that you need to be using your own judgment, forming your own opinion BASED ON WHAT YOU'VE ALREADY LEARNED. You can't find your own opinions on the Internet!!