China, Russia, And The Global Spy War

On this episode of "The Federalist Radio Hour," Calder Walton, a
historian at Harvard’s Kennedy School of Government, joins
Federalist Culture Editor Emily Jashinsky to discuss the state of
global intelligence and how the spy war between Eastern nations
like Russia and China and Western powers like the U.S. and U.K.
will shape international relations for decades to come.

You can find Walton's book "Spies: The Epic Intelligence War
Between East and West" here.