Clearly you couldn't even feed the planet without the transportation network necessary to distribute the food. Nor could you even grow it. Modern agriculture de

Clearly you couldn't even feed the planet without the transportation network necessary to distribute the food. Nor could you even grow it. Modern agriculture depends on fertilizer, which is made from mined materials. Farms are run with fossil fuel powered equipment. The quality of life and the length of life extended dramatically with the advent of the automobile and electricity (also fossil fuel powered). We wouldn't even be having this discussion right now. Not even to mention the serendipitous effects of expanding human horizons beyond what could be traveled by horse, which alone is a substantial achievement and led to more discoveries and human connection than I can even fathom. Without transport and communication there would be no modern era, no internet, no tech sector. Just an extension of the 19th century.