We compute the variation of the Fokker-Wheeler-Feynman total linear and
angular momentum of a gravitationally interacting binary system under the
second post-Minkowskian retarded dynamics. The resulting $O(G^2)$
equations-of-motion-based, total change in the system’s angular momentum is
found to agree with existing computations that assumed balance with angular
momentum fluxes in the radiation zone.

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