Legal Thought and Philosophy clarifies background questions in legal research projects, such as the relationship between law and justice, law and politics, law and knowledge, facts and norms, normativity and validity, constituent and constitutional power, and rule and context. It provides advanced students in law and philosophy with an account of legal thinking that combines analytical and phenomenological insights. From a conception of justice as principled political self-restraint, the book explains why there are moral reasons to separate law from morality conceptually and in what sense a legal order is positive - that is, set by authority and bound up with history. The book explores the conditions under which law may become an object of knowledge and theorising, before finally discussing how these features come together in law as rule-following by citizens, officials, judges, and legislators alike. Addressing advanced students in law and philosophy, this key book: bridges separate traditions in legal philosophy (in particular analytical philosophy and phenomenology) develops a view of law as an institution of authority from a conception of justice in the socio-political relationship between 'we' and 'the others' presents a systematic account of normativity and validity explains in what sense law is 'doing things with rules'.