Belief that individuals are naturally endowed with basic human rights; those rights that are so much a part of human nature that they cannot be taken away or given up, as opposed to rights conferred by law. The Declaration of Independence states that these natural rights include the rights to "Life, Liberty and the pursuit of Happiness."
Natural rights Definition from Encyclopedia Dictionaries & Glossaries
Natural and legal rights are two types of rights. Legal rights are those bestowed onto a person by a given legal system. Natural rights are those not contingent upon the laws, customs, or beliefs of any particular culture or government, and therefore universal and inalienable (i.e., cannot be sold, transferred, or removed).