 If one chooses position as the preferred physical observable and adopts the particle dynamics of Bohm’s theory, then one can construct a many-threads theory by fixing the initial wave function and the Hamiltonian and by considering every possible initial configuration of particles to correspond to a different full history for a possible world. Here the prior probabilities are given by the distribution postulate in Bohm’s theory, and these probabilities are Bayesian updated on the results of measurements. The updated epistemic probabilities yield the effective Bohmian wave function. So the only difference between Bohm’s theory and the associated many-threads theory is that the many-threads theory treats all possible Bohmian worlds as simultaneously existing worlds, only one of which is ours. A many-threads theory can be constructed for virtually any determinate physical quantity just as one would construct a hidden-variable or a modal theory. (See the entry on  modal interpretations of quantum mechanics.)