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.
History of the British peerage
The next major event in the history of the Peerage occurred in 1707, when England and Scotland united into Great Britain. There were, at the time, one hundred and sixty-eight English peers and one hundred and fifty-four Scottish ones. English peers did not wish for their individual significance in the House of Lords to dwindle, so they agreed to permit Scotland to elect just sixteen representative peers to sit in the House of Lords (see Parliament and the Peerage). After the Union, creations in both the Peerage of England and the Peerage of Scotland ceased and all new peerages were created in the Peerage of Great Britain.