  In the presence of approximate global symmetries that forbid relevant
interactions, strongly coupled light Dark Matter (DM) can appear weakly coupled
at small energy and generate a sizable relic abundance. Fundamental principles
like unitarity restrict these symmetries to a small class, where the leading
interactions are captured by effective operators up to dimension-8. Chiral
symmetry, spontaneously broken global symmetries and non-linearly realized
supersymmetry are examples of this. Their DM candidates (composite fermions,
pseudo Nambu-Goldstone Bosons and Goldstini) are interesting targets for LHC
missing-energy searches.
