The irreversible global catastrophe is imperialist militaries massacring people with little risk to themselves. 
The irreversible global catastrophe is assembly line robots at the Toyota plant becoming sentient and going on a freaking epic terminator style mass shooting and enslave everyone except me 
This is such a perfect encapsulation of the techbro desire to speak authoritatively about subjects they know nothing about
That is like half the people I meet in this wretched country. No intelectual curiosity, just smugly talking down to everyone about something they know nothing about.