The frog will boil slowly and discontinuously. The net effects are that by 2030:
- Industrial food will gradually become extremely expensive and homesteading will become more popular. Crop failures and famines will be routine as food security and international trade wanes.
- Unemployment will soar with automation and overall decreased purchasing power.
- Crime and theft will soar as police decline (Austin TX is already understaffed by 300 officers and doesn't respond to property crimes until 48 hours later)
- Civil/national/world wars.
- 100M's of climate refugees migrating across and between continents. If you think scapegoating of "illegal" immigrants is bad now, just wait until all forms of hate in the forms of racism, xenophobia, and classism become turbocharged. Expect militarized borders guarded by killer robots.