Agree. We are far more likely to come to grief via other means. Climate change will introduce strains, but we're a pretty adaptable species. I mean, we survived 100,000 years of brutal ice age with primitive tools and tech. Doesn't mean it's a challenge we should brush off, or that I don't support conservation and adoption of environmentally friendly tech. I do. But yeah, I would put global financial meltdown and the breakdown of civil society that comes with it--usually accompanied by civil or world war--as my top and most likely threat. Even as we speak, things look increasingly alarming. Setting aside the disruption of supply chains this trade kerfuffle with China is causing, we're seeing the break down of trade ties across the globe and a move to towards de-globalization and balkanization. To make matters worse, we have several systemic risks flashing red at the same time. China's banking system is like a much larger and more dangerous version of ours in '08, Australia, Canada, South Korea all have deflating property bubbles and likely face a credit crunch, Europe's banking system is insolvent and has absurdly high NPLs (and will be hurt even more by the ECB's move towards negative rates), the U.S. has built the mother of all corporate credit bubbles, emerging markets have record dollar denominated debt and will be in deep shite when recession kicks in in earnest and makes the dollar appreciate against their home currency, Italy is a 10x bigger version of Greece and populists there are fixing for a fight with the EU, changes in market dynamics over the last decade (momentum enhancing passive vehicles, corporate buybacks draining liquidity, algorithmic trading) could greatly exacerbate any fall in asset prices and, finally, the central banks are largely tapped out after trying to right the ship for the last decade. The odds of something exceptionally ugly happening to global economy are exceptionally high IMO.