'Sometimes discrimination is a good thing. Elite universities would not be able to function if they had to accept everyone who wanted to attend. Professional choirs need to limit their vocalists to people who can carry a tune. And within the voluntary groups of civil society, we tolerate even some forms of discrimination that would elsewhere be impermissible. We would rightly be enraged if the federal government discriminated on the basis of gender or religion. But we allow Wellesley College to exclude men, and we allow the Mormon Tabernacle Choir to exclude non-Mormons.'
John D Inazu, Confident Pluralism, p.43.