 In a free society, citizens will have disparate worldviews. They will believe in different religions or none at all; they will have differing conceptions of right and wrong; they will disagree on how to live and on what relationships to value. Citizens will have contrary commitments, yet within any country there can only be one law. The law must either establish a national church, or not; women must either have equal rights, or not; abortion and gay marriage must either be permissible, or not; the economy must be set up in one way or another.