The political left is in decline in democracies worldwide. Europe, Brazil, the UK, etc. Now the US is a one-party nativist, semi-theocratic state, on a path toward a Turkish or Russian outcome, with one dominant party and a scattered, disorganized opposition.
I think this is a long-term change, because the left has reached its ideological point of self-destruction. Extreme individualism discourages group identity, and without that you don't get the infrastructure right-wing parties can organize, or the willingness to sacrifice on an individual level. Leftists can organize protests, but not enduring institutions (see Occupy "movement").
We can expect US economic growth to approximate the outcomes of similar systems for at least the next few years. The days when you could just buy an index fund and multiply 2-4% GDP growth by corporate leverage are over.
The US will catch many colds in the near future, which makes emerging markets even more at risk of getting the flu - even those EMs who are executing well. Developed markets whose exports are tied to economic growth (e.g. Japan, Canada, Australia, S. Korea, China) will be constrained by the growth of their US end client.
With both bonds and real estate at nosebleed levels, I'm challenged to find a rationale for anything, which probably means it's time to sit in cash. That adds years to my path to ER, but keep in mind Jacob at Early Retirement Extreme spent the majority of his five-year path to ER hoarding in a bank account!
In my case, 3.67% is my mortgage rate, and my risk-free rate of return. Years ago, I swore I'd never, ever prepay a dime at such a low rate, but now I'm not so sure it isn't my best risk-adjusted option. I could move funds into my mortgage and then have a pre-approved HELOC lying in wait in case a 2008 style market crash created better opportunities.
It might also be a good time to invest in educational upgrades that would make me more compeitive during the dark days ahead.