Peerage of England
The ranks of the English peerage are, in descending order, Duke, Marquess, Earl, Viscount, and Baron. While most newer English peerages descend only in the male line, many of the older ones (particularly older baronies) can descend through females. Under English inheritance law all daughters are co-heirs, so many older English peerage titles have fallen into abeyance between various female co-heirs.
Peerages in the United Kingdom
Apart from hereditary peerages, there exists peerages that may be held for life and whose title cannot be passed onto someone else by inheritance. The Appellate Jurisdiction Act 1876 and the Life Peerages Act 1958 authorise the regular creation of life peerages, with the right to sit in the House of Lords. Life peers created under both acts are of baronial rank and are always created under letters patent.