Final answer:
Thurgood Marshall, a major figure in the civil rights movement, wrote The Legal Attack to Secure Civil Rights.
Step-by-step explanation:
The major figure in the civil rights movement who wrote The Legal Attack to Secure Civil Rights was Thurgood Marshall. He was a renowned lawyer and the first African American Supreme Court Justice. Marshall played a crucial role in fighting legal battles that led to landmark civil rights decisions, such as the Brown v. Board of Education case.
Learn more about Thurgood Marshall and his contribution to the civil rights movement