Gramscian damage
On a different level, in the 1930s members of CPUSA (the Communist Party of the USA) got instructions from Moscow to promote non-representational art so that the US’s public spaces would become arid and ugly.
Americans hearing that last one tend to laugh. But the Soviets, following the lead of Marxist theoreticians like Antonio Gramsci, took very seriously the idea that by blighting the U.S.’s intellectual and esthetic life, they could sap Americans’ will to resist Communist ideology and an eventual Communist takeover. The explicit goal was to erode the confidence of America’s ruling class and create an ideological vacuum to be filled by Marxism-Leninism.
Accordingly, the Soviet espionage apparat actually ran two different kinds of network: one of spies, and one of agents of influence. The agents of influence had the minor function of recruiting spies (as, for example, when Kim Philby was brought in by one of his tutors at Cambridge), but their major function was to spread dezinformatsiya, to launch memetic weapons that would damage and weaken the West.