  The aim of this short review is to summarize the developing theory aimed at
describing the effect of plastic events in amorphous solids on its emergent
mechanics. Experiments and simulations present anomalous mechanical response of
amorphous solids where quadrupolar plastic events collectively induce
distributed dipoles that are analogous to dislocations in crystalline solids.
The novel theory is described, and a number of pertinent examples are provided,
including the comparison of theoretical prediction to simulations or
experiments.
