European geologists were generally receptive to the theory as early as the the 1920s, and by the 1940s it was the working assumption for most field work.
The only geologists to reject the theory aggressively were a group in North America who read a lower quality translation (of the original German book presenting the theory) which may not have been adequately checked for tone.
The author was perceived to be openly arrogant and dismissive of current work in the field. For this reason, his theory’s rate of acceptance among US geologists lagged behind.