Historian Damian Valdez reflects on the meaning of 1975, a fateful year for the international order. Read by Leighton Pugh. FURTHER READING: 1975, the year that made the modern world | Damian Valdez Image: A helicopter is pushed off the overcrowded deck of the aircraft carrier USS Hancock (CV-19) off the coast of South Vietnam during the fall of Saigon. Credit: ZUMA Press, Inc. / Alamy Stock Photo