People discriminate all the time. Countries discriminate on the basis of nationality, requiring you to be a citizen to vote, own property, etc. — they discriminate against foreigners. Companies only hire you if you have knowledge and experience — they discriminate against those with no education or skills. Banks only lend to you if they think you can pay them back — they discriminate against those with poor credit records or low income. Sports teams discriminate against the weak or slow. They discriminate on the basis of gender too — men play on the men's team, women on the women's. Everyone discriminates against the ugly or socially awkward, constantly. Some of these you may consider okay. Some not. So, what makes some kinds of discrimination OK and others not? When is it not OK to discriminate?