Resilience theory, also known as resilience thinking, has emerged as a powerful theoretical framework for many disciplines. Legal theorists have, however, only in the past decade begun to contextualize resilience thinking for legal systems. This chapter summarizes where resilience thinking has gone thus far in legal theory and recommends where it should go from here. The authors start by asking the two fundamental questions of resilience thinking, putting them in the context of legal systems: resilience of what and resilience to what? Because of the special role legal systems play in the governance of complex social-ecological systems, the authors add a third question: resilience for what? We then explore five key features of system resilience as they relate to legal systems: (a) reliability, (b) efficiency, (c) scalability, (d) modularity, and (e) evolvability. Using environmental law as a case study, the discussion offers concrete examples of how each property manifests and operates in legal systems. The authors close with an exploration of how what has been learned thus far about legal system resilience from theoretical research and practical experiences should shape future research, in particular toward a deeper understanding of adaptive governance.