 The development of advanced materials based on well-defined polymeric architectures has been a highly successful area of research, with controlled radical polymerization techniques being used to produce exquisite precision in polymer products. One such technique, reversible addition, fragmentation chain transfer, RAFT, uses thio-carbonelpheo, TCT, compounds to control the radical chain growth of vinyl polymers. Recent developments in RAFT have opened up this technique to a wider audience, allowing for more complex polymers to be prepared for demanding applications. This paper surveys the latest advancements in RAFT, including strategies for initiating and controlling the reaction, as well as the potential for using these polymers in a variety of applications. This article was authored by Mitchell D. Knopfling, Chang Fu, Amin Rehani, and others.