6.7 Presumption against Impairing Obligation or Permitting

Advantages from One's Wrong The two-fold presumption: (i) the obligations' non-impairment (the contracts-and-rights not presumed infringed — the vested obligations' protection (the property-and-contract rights' respect — the retrospective-and-taking questions' companion)); (ii) the wrongdoer's no-advantage: the statute not construed to let the wrong-doer profit from the wrong (the ex turpi causa's statutory cousin — the criminal's-or-breacher's benefit-bar); the applications: the forfeiture-and-restitution cases (the wrongdoer's disentitlement readings); the family-and-property cases (the murderer's inheritance-bar doctrine's kinship — the "no one profits from his own wrong" maxim).