Now you're playing technicalities. No one since 0 AD has likely manufactured something solely by themselves, because a carpenter building a house wasn't making

Now you're playing technicalities. No one since 0 AD has likely manufactured something solely by themselves, because a carpenter building a house wasn't making his own nails and hammers and saws. One person can easily manufacture a whole vehicle, no question about it. A chinese man hand-built a (somewhat) replica Lamborghini in his basement; an Italian man built his own supercar sans the Audi V8 engine; and people regularly build small engines, and this guy built most of his own V8 bike engine: http://thekneeslider.com/archives/2010/04/15/bmw-with-694cc-homemade-v8-engine/ http://thekneeslider.com/archives/2010/04/15/bmw-with-694cc-... So I'm sorry, but it's easily capable. I wouldn't argue automobiles, because by the simplest definition an automobile is very easy to self-manufacture given that a vehicle doesn't require windshields, doors, lights, indicators, anything. One man today can still easily (with time) construct their own home from ground up. I helped lay a 30'x30' cement floor with nothing but a shovel, mixer and barrow. Beyond that the house is easy and I've literally done everything else from brick laying to electrical and plumbing to siding and framing. Like I said, an average person cannot do these things today.