Perhaps the biggest surprise in Eurasia Group's top 10 geopolitical risks for 2023 is No. 10: water scarcity. But you should definitely pay attention to it.

The problem is that we take access to water for granted, says Eurasia Group analyst Franck Gbaguidi.

And while we've kept ignoring the issue, now the global population has hit 8 billion people. What's more, climate change is making water even less plentiful — and therefore more political.