The Continental Drift Theory, proposed by Alfred Wegener in the early 20th century, was not widely accepted until the 1960s, largely due to the development of the theory of Plate Tectonics.

Here's a breakdown:

* Early 20th century: Wegener's theory was initially met with skepticism due to a lack of a plausible mechanism explaining how continents could move.

* Mid-20th century: The development of seafloor spreading and paleomagnetism provided strong evidence for the movement of continents. This evidence, along with other discoveries like subduction zones and transform faults, led to the formulation of Plate Tectonics.

* 1960s: The Plate Tectonics revolutionized the understanding of Earth's structure and processes, providing a comprehensive framework for explaining continental drift.

While the acceptance of Continental Drift was a gradual process, the 1960s marked a significant shift in the scientific community's understanding, leading to its widespread acceptance.