If we woke up tomorrow and it was gone, all of it, everywhere without warning, yes it would be rough, but not the end of the world.yea... but almost all of civilization's population 200 years ago wasn't centered in major metropolitan areas which are completely void of natural resources.
we NEED oil to keep the masses alive
If woke up tomorrow and found we only had 5 years worth left, we'd be just fine.
If faced with no other choice, we'd transition to other things during that 5 year period fairly easily.