"The Eighth Amendment to the United States Constitution protects all persons against the infliction of “cruel and unusual punishment.” Amici contend that the expanding constitutional concern, as expressed by this Court, with practices which “offend the dignity of man,” are contrary to “the evolving standards of decency that mark the progress of a maturing society” and punishment “disproportionate to the offense committed” as violative of the Eighth Amendment necessitates a finding that laws restricting abortion are unconstitutional...."