Hugo Perezcano addresses some of the flaws in the arguments that have been advanced against investor-state arbitration (ISA). Excluding ISA from international investment agreements will not resolve any of the underlying problems, actual or perceived, the author argues. It is likely to intensify others, such as fragmentation of international investment law, and to fuel adverse reactions and political rhetoric from those countries upon which the system continues to be imposed. A better approach would be to work toward improving the system.