 An account of the value of a particular form of marriage itself (and not just qua tradition) is needed. One thought is that monogamous marriage encourages the sexual self-control needed for health and happiness; another is that it encourages the goods of love and intimacy found in committed relationships. State support for monogamous marriage, by providing incentives to enter marital commitments, thus helps people lead better lives (e.g. Macedo 1995, 286). However, this approach faces objections. First, the explanation in terms of emotional goods underdetermines the institution to be supported: other relationships, such as friendships, embody emotional goods. Second, claims about the value of sexual self-control are controversial; objectors might argue that polygamy, polyamory, or promiscuity are equally good options (see 5.2). There is a further problem with this justification, which speaks to a division within liberal thought. Some liberals embrace neutrality, the view that the state should not base law on controversial judgments about what constitutes valuable living. To such neutral liberals, this class of rationales, which appeal to controversial value judgments about sex and love, must be excluded (Rawls 1997, 779). Some theorists have sought to develop rationales consistent with political liberalism, arguing, for instance, that the intimate dyadic marital relationship protects autonomy (Bennett 2003), or that some form of marriage could be justified by its efficiency in providing benefits (Toop 2019) or its role in protecting diverse caring relationships (Brake 2012), fragile romantic love relationships (Cave 2017), or caregivers and children (Hartley and Watson 2012, Toop 2019; see also May 2016, Wedgwood 2016).