#ideological_barrier__ideologicalbarrier  a barrier to cooperation or interaction resulting from conflicting ideologies
  supertype:  #barrier.obstacle  any condition that makes it difficult to make progress or to achieve an objective; "intolerance is a barrier to understanding"
  subtype:  #iron_curtain  an impenetrable barrier to communication or information especially as imposed by rigid censorship and secrecy; used by Winston Churchill in 1946 to describe the demarcation between democratic and communist countries
  subtype:  #bamboo_curtain  an ideological barrier around communist China especially in the 1950s and 1960s
  subtype:  #color_bar__colorbar__colour_bar__color_line__colorline__colourline__Jim_Crow  barrier preventing blacks from participating in various activities with whites

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