It's not so clear that the shut-down of the NEP doomed the USSR. The argument that without Stalin's focus on heavy industry the USSR would have lost WW2 is a go

It's not so clear that the shut-down of the NEP doomed the USSR. The argument that without Stalin's focus on heavy industry the USSR would have lost WW2 is a good one. Naturally the NEP developed light industry much more strongly than Stalin has and neglected the heavy industry necessary to win WW2 relatively.