 We shall start with the Everett theory (or many-worlds interpretation) in some of its main variants. This is in fact most closely related to decoherence, since the latter can be used to naturally identify stable (if branching) structures within the universal wave function that can instantiate the multiplicity of worlds or measurement records or conscious experiences characteristic of Everettian views. Another approach that arguably makes crucial use of decoherence is pilot-wave theory (or de Broglie–Bohm theory, or Bohmian mechanics), where particle positions (or other suitable ‘beables’) are guided in their temporal evolution by the universal wave function. The branching structure of the latter will clearly have an effect on the character of the evolution of the variables it guides. Instead, spontaneous collapse theories intuitively have less to do with decoherence because they seek to suppress unwanted superpositions. Still, they are also arguably able to make use of decoherence, perhaps with some qualifications.