In quantum mechanics, einselections, short for "environment-induced superselection", is a name coined by Wojciech H. Zurekfor a process which is claimed to explain the appearance of wavefunction collapse and the emergence of of reality from . In this approach, classicality is described as an emergent property induced in open quantum systems by their environments. Due to the interaction with the environment, the vast majority of states in the Hilbert space of a quantum open system become highly unstable due to entangling interaction with the environment, which in effect monitors selected observables of the system. After a decoherence time, which for macroscopic objects is typically many orders of magnitude shorter than any other dynamical timescale, a generic quantum state decays into an u