Yes, we can get by without gasoline no problem, but the problems on today is land doesn't run in families anymore. Back then, everyone was self-sufficiant growing their own crops, and raising their own food, but today, there is no more open land. IF we come to that point again, what good is a 12 story office building going to do for us? Or a movie theatre?

We'd have to tear it all down and start again, and even then, it would be very hard to grow any source of food.

Open land is scarce these days. There are a small number of crops, but even a bigger amount of buildings that would be 100% useless if no more shipments of product came along. We'd be screwed, without a doubt.