" they’ll make us extinct, or at least hunter-gatherers again, with only the odd pocket of “civilized†(agricultural, settled) humans in the odd, eco-friendly location."
Actually, it's the liberal eco- freaks who want us to become hunter- gatherers again (Minus the "Hunter" part; They maintain that hunting "Makes Gaia cry" or something, and demand that all Americans be uber- vegans like them), they believe that agriculture and permanent settlements "Rape the planet."
Now we can include our interloper (who has plenty of time post on the DUmp, but no time to account for himself here) among those who want to destroy the entire world economy by "outlawing" fossil fuel. Or, at least he wants to unilaterally disarm.
Yeah, Buzz. Even Romulox knows you're full of shit. Guess what, DUmmy? For you to have your Johnny Appleseed fantasies to come true, millions of Americans would lose their jobs forever. Outlaw fossil fuels? OK...99.9% of the cars on the road become worthless and useless. People who design, build, and service them lose their jobs. Oil industry, gone. You think 2008 was bad? Try forcing people to live your liberal fantasy bullshit dream. And now, with some of the oppo research in our pocket, it would appear that you would in some measure be biting the hand that feeds you.
It would be way worse than just that, in the broader sense.
Start by considering all the non- auto products that use fossil fuels: Boats (And, by extension, equipment that is normally associated with boats, such as life jackets and flares), motorized yard tools (Chainsaws, lawnmowers, etc.), and so on. All their industries would go bankrupt too.
Then, all those millions if not tens of millions of Americans left unemployed would thus have less income to spend in other ways, from restaurants to shopping centers to theme parks to hotels to museums to movie theaters and so on. Most of those businesses would thus go bankrupt as well due to how much income they'd be losing. Then, all those employees would have less income to spend in the remaining businesses, and so on.
In summary, a near complete, almost certainly permanent collapse of the US economy and the worst/ highest unemployment rate of any nation in recorded history, all so you liberal tofu- and- granola eco- freaks could have your demented little "Social experiment."