| We control what|
you think with
|Said and done|
|Jargon, buzzwords, slogans|
Fifth column is a term coined by Nationalist General Emilio Mola during the Spanish Civil War (1936-39) to designate a group within a population who are working to overthrow or disrupt the existing system - though the activity has been in existence for much longer.
In some contexts the term is used against groups who are exercising cultural and other affinities with groups outside the state but who are not actually attempting to overthrow the regime. Many xenophobic conspiracy theories center around some racial, ethnic, or religious group working to undermine glorious civilization.