The fundamental freedoms, of speech, conscience, privacy and religion, are now an essential part of the fabric of contemporary society, set down in our most basic laws and regularly invoked in our political and cultural debates. These freedoms play a vital role in securing the spaces and opportunities within which people are able to pursue their own lives in their own ways. Much has been written about the political and legal implications of the fundamental freedoms and their entrenchment in bills of rights. This is the first book to undertake a comprehensive philosophical examination of their moral bases. It offers a penetrating analysis of what makes these particular freedoms matter to us in the ways that they do, and of the true significance of their entrenchment in law.