Personhood

I like this point made by Cal Thomas in his column today:

"The ruling came the week of the annual March for Life, which draws thousands to Washington to mark that same court's 1973 Roe v. Wade ruling. The march has become not so much a protest as an affirmation of the value of all human life. What makes the ruling and the march ironic is that the 1973 court, in essence, downgraded a human fetus to the level of nonperson, while the modern court has invested "personhood" in corporations. Does anyone else see a contradiction or at least a moral inconsistency in these two rulings?"