In this Article, we demonstrate, contrary to conventional wisdom, that all rights are relationally contingent. Our main thesis is that rights afford their holders meaningful protection only against challengers who face higher litigation costs than the rightholder. Contrariwise, challengers who can litigate more cheaply than a rightholder can force the rightholder to forfeit the right and thereby render the right ineffective. Consequently, in the real world, rights avail only against certain challengers but not others. This result is robust and pervasive. Furthermore, it obtains irrespectively of how rights and other legal entitlements are defined by the legislator or construed by courts. We also show that in many legal areas, such as proper...