This is still late-stage capitalism. Capitalism has persisted in opposition to effectively all Human well-being for centuries, since at-least the 1700s. So, it was still very much Late-Stage Capitalism in the 1940s. That we have yet to put this vile system out of all our misery yet doesn't modify which stage it's been stuck in for X period of time.
Further it's been Imperialism in the Colonial or Neo-Colonial style for how long now? Four centuries? Five?