David B. Kaplan

Made broad contributions to particle physics, nuclear physics and cosmology: co-proposed a composite Higgs boson theory; described Bose-Einstein condensation of kaons in dense nuclear matter; described new experimental techniques to probe strange quarks in the nucleon; developed effective field theory for low energy nuclear physics. His theory of domain wall fermions - a topological insulator - solved a decades-old problem on realizing chiral symmetry in lattice field theory.  He co-developed the first models for electroweak baryogenesis, described how conserved dark matter could solve a cosmic coincidence, and suggested neutrino oscillations  as a probe of dark energy.