"Milton Rokeach claimed that the defining difference between the left and right was that the left stressed the importance of equality more than the right.
"=== Rokeachove raziskave ===Če niste zadovoljni z delom Hans J. Eysencka, je tudi Milton Rokeach razvil svoj dvoosni model politične vrednote v letu 1973, kar utemeljuje na idejah "svobode" in "enakosti", kot je opisal v svoji knjigi "The Nature of Human Values.