I'm holding on to some optimism re: Paris summit. It's too early to say that nothing was done, as we haven't hit the first checkpoint. In the U.S., the most troubling thing to happen since Paris is the Supreme Court's decision to temporarily block Obama's clean power plan. Given the vacancy on the court, it's unclear how this will play out once the case makes its way up.

In terms of the 'we don't seem to think about it' – it's behavioral economics 101. We're very optimistic about our futures, and very obsessed with the present. It's why people need to be opted-in to 401k plans. We imagine 'tomorrow' to be this wonderful place where everything will get done and work out ok.

My optimism on Paris? It's a cautious one...