This is incorrect. What you’re describing is the Third World. The Second World was the eastern bloc and other Soviet allies. The First World was NATO allies. The implication is basically that the third world was not important enough to be a factor in the cold war.
What happened to the second world? You never hear about it
Countries that didn’t ally with either the Soviets or the US are considered “second world”
This is incorrect. What you’re describing is the Third World. The Second World was the eastern bloc and other Soviet allies. The First World was NATO allies. The implication is basically that the third world was not important enough to be a factor in the cold war.