The J Curve

I finished off The J Curve, by Ian Bremmer, a few days ago. Bremmer provides a whirlwind tour of the economic, social, and political environment of a number of different countries and how those affect the openness and stability of each country. It's obvious that Bremmer knows the subject matter quite well, and it's interesting to read the book just for the condensed insights into the structure of different counrties. The idea that there is a continuous J-curve relationship between openness and stability seems plausible enough, but I wonder if too much openness can then cause stability to go back down. The number of direct democracies across the world does not suggest to me that stability keeps on rising.