Introduction -- Where Do Rights Come From? -- In a world full of wrongs, rights have never been so important. We tend to take our rights for granted until they are endangered, and we appreciate them more when we are at risk of losing them. Today there are powerful forces that pose grave dangers to the rights that we have long taken for granted. At the same time, many defenders of rights insist that we accept the case for them essentially on faith. The debate has become polemical, with one side arguing that the new reality of global terrorism changes everything, while the other argues that it changes nothing. A more nuanced discussion is needed to strike the appropriate and ever-changing balance between security and liberty. Any such discussion must include the question: Where do rights come from? The answer to this question is important because the source of our rights determines their status, as well as their content.