Getting all the food you needed from one place required a single large-ish chunk of flattish ground—not the sort of spread or variety that could sustain hunter/gatherers. The seasonality of movement of the hunter/gatherer diet was largely incompatible with the constant attention requirements of crops, while the seasonal nature of harvesting crops was largely incompatible with the needs of humans’ desires to eat year-round.
See Ayn Rand Paper
