Psyop became a science just before & during WWII. The techniques and technologies were imported to the west. They have been studied and improved, and put to use

Psyop became a science just before & during WWII. The techniques and technologies were imported to the west. They have been studied and improved, and put to use for and against the civilian population ever since, ranging from the good (nod at Sesame Street) to evil (a motion indicating ‘most everything else’).