This paper questions the Lewis Path perspective of a "world without agriculture" which underpins the "structural transformation" paradigm of "modern growth." It shows that the Lewis Path is only one of four potential structural paths, and that half of the world's population is spiralling into a "Lewis Trap" with more farmers and an increasing income gap between them and other workers. After showing how land constraints and the productivity dynamics outside agriculture might prevent this population from switching to a Lewis Path, it delineates the condition of an alternative path that would not transfer the disparity problem to cities.
