Superinsulators, a novel topological state of matter predicted by our collaboration and experi-
mentally observed near the superconductor-insulator transition (SIT), are the electric-magnetic
(S) duals of superconductors. In superinsulators, Cooper pairs are confined by electric fields
compressed into strings via a monopole condensate (an instanton plasma in (2+1) dimensions),
mirroring the dual Meissner effect and resembling quark confinement in hadrons. This realizes
the electric counterpart of the dual superconductor mechanism proposed for confinement in QCD.

