By disclosing some of the country’s darkest and dirtiest secrets in the wake of the presidential excesses of Watergate and the Vietnam War, it was Colby who saved the CIA he loved from its own destruction. In the process, he became possibly the most important national security whistleblower in modern American history.

https://www.justsecurity.org/68065/how-late-dci-william-colby-saved-the-cia-and-what-that-can-teach-us-today/