Appears in collection : Mikefest : A conference in honor of Michael Douglas’ 60th birthday

A new understanding of the infrared dynamics of QCD theories has emerged in recent years, leading to nonperturbative renormalization group flows of QCD theories. We will discuss some of these developments, including QCD theories that develop a mass gap, the endpoint of renormalization group flows, and the (conjectural) emergence of nonperturbative condensates.