I do not think there is a common ground. Of course, both authors talk about the same-sex marriage. Besides, Sullivan agrees with this, and Bennett is the opponent. However, what Sullivan really wants to say is the right of human being. Everyone has the same right, and there is no difference between men and women and black and white. As he says, this is why homosexuality should have the same right as other people have. Right to marry is just one of the whole problems for homosexuality. In contrast, Bennett focuses on marriage. He talks about what the marriage is, and what the marriage should be. In addition to this, he mentions other types of marriages like polygamy and family marriage. If there were these styles of marriages as a culture in the US, he would accept them. He says we should not change this culture because our ancestors made this.