What About Past Harms Done By Corporations Because of Corporate Personhood? Saturday, December 22 2007 @ 06:36 PM MST Contributed by: BMcDonald Views: 504 That is an interesting question with no certain answer. The Constitution prohibits ex post facto laws (laws that punish for deeds committed before the law was written), and properly so. However, revoking corporate personhood does not create an ex post facto law. It may be possible to force corporations to rectify damage they did to the environment during the era of corporate personhood. Return to FAQ Index Page