Environmental change for one. example Syria losing half its agriculture land due to climate change has a lot to do with their poverty increase which then has other downstream consequences (ISILs numbers grow -&gt; more terrorism -&gt; increased military spending -&gt; govts invasion of privacy). Add on that the shoe has yet to drop for most consequences related to climate change - yet it&#x27;s still real and happening today.<p>Add to that culture and knowledge exchange effects and I&#x27;m pretty sure income distribution, while easily measured, would not be towards the the top.