In real life, we have a strong expectation that the future can’t affect the past, but in the Newcomb problem we have pretty good evidence that it can.
In the standard formulation (a perfect predictor) one-boxers always end up winning and two-boxers always end up losing, so there is no issue with causality, except in the mind of a confused philosopher.
In the standard formulation (a perfect predictor) one-boxers always end up winning and two-boxers always end up losing, so there is no issue with causality, except in the mind of a confused philosopher.