Louis Agassiz was a prominent Swiss naturalist known for his strong advocacy of the theory that large portions of Earth were once enveloped in ice. His views were groundbreaking during a time when many were resistant to such ideas, leading to significant advancements in the understanding of glaciers and climate changes.

Despite his contributions to science, Agassiz's assertive stance on these theories often alienated his peers. His insistence on the validity of ice ages and glaciation created friction within the scientific community, showcasing the challenges faced by pioneers in accepting revolutionary concepts.