Final answer:
A Wrinkle in Time is a science fiction novel that involves characters traveling through wrinkles to rescue their father. There are no specific historical figures mentioned in the book as opposing this concept.
Step-by-step explanation:
A Wrinkle in Time is a science fiction novel written by Madeleine L'Engle. It follows the story of Meg Murry and her younger brother Charles Wallace as they journey through space and time to rescue their father. The 'thing' referred to in the question is a wrinkle, which is a concept in the book that allows characters to travel across dimensions.
In terms of historical figures opposing the concept of traveling through wrinkles, there aren't any specific historical figures mentioned in the book. The opposition comes more from the challenges and difficulties faced by the characters themselves, as well as the risks and dangers associated with traveling through the wrinkles.