Hemp was roughly similar to flax, but coarser and not so comfortable to wear, so it tended to be used for things like rope and sails. It did, however, have the evidently very considerable compensating advantage that you could smoke it and get high, which Barber believes accounts for its prevalence and rapid spread in antiquity. Not to put too fine a point on it, people throughout the ancient world were very, very fond of hemp, and grew more of it than they needed for ropes or sails.
