Social media channels – like global media generally – have a tendency to be dominated by the US – due almost exclusively to their sheer volume of users. In the world of social and environmental enterprise – where global participants are located in some of the world’s poorest countries – i suspect the disparity is even more obvious.
It’s not that they are necessarily smarter (although some of the smartest people I’ve ever met are US citizens), nor is it that they’re more innovative, effective or impactful (although many of the most in all three also live stateside). It’s simply that there are more of them, and they’re all hyper-connected.