An aircraft passenger seat with dynamic seat back breakover including a pivotally-attached seat back element and a seat back breakover mechanism including an articulating weighted inertia linkage operable for coupling the seat back element in a first operating condition in which the seat back element is movable between an upright taxi takeoff and landing (TTOL) position and a reclined position, and decoupling the seat back element in a second operating condition to allow the seat back element to move forward past the upright position, the first operating condition corresponding to inertial loading below a predetermined threshold value and the second operating condition corresponding to inertial loading above the predetermined threshold value.