Phillip Glass has written numerous operas.
Richard Neville , 16th Earl of Warwick -LRB- 22 November 1428 -- 14 April 1471 -RRB- , known as Warwick the Kingmaker , was an English nobleman , administrator , and military commander .. Earl of Warwick. Earl of Warwick. English. English people. The son of Richard Neville , 5th Earl of Salisbury , Warwick was the wealthiest and most powerful English peer of his age , with political connections that went beyond the country 's borders .. Earl of Salisbury. Earl of Salisbury. English. English people. peer. Peerage. One of the leaders in the Wars of the Roses , originally on the Yorkist side but later switching to the Lancastrian side , he was instrumental in the deposition of two kings , a fact which later earned him his epithet of `` Kingmaker '' to later generations .. Wars of the Roses. Wars of the Roses. Yorkist. House of York. Lancastrian. House of Lancaster. Through fortunes of marriage and inheritance , Warwick emerged in the 1450s at the centre of English politics .. English. English people. Originally he was a supporter of King Henry VI ; however , a territorial dispute with the Duke of Somerset led him to collaborate with Richard , Duke of York , in opposing the king .. Henry VI. Henry VI of England. Duke of Somerset. Edmund Beaufort, 1st Duke of Somerset. From this conflict he gained the strategically valuable post of Captain of Calais , a position that benefited him greatly in the years to come .. Captain of Calais. Constable of Calais. The political conflict later turned into full-scale rebellion , where in battle York was slain , as was Warwick 's father Salisbury .. battle. Battle of Wakefield. York 's son , however , later triumphed with Warwick 's assistance , and was crowned King Edward IV .. Edward IV. Edward IV of England. Edward initially ruled with Warwick 's support , but the two later fell out over foreign policy and the king 's choice of Elizabeth Woodville as his wife .. Elizabeth Woodville. Elizabeth Woodville. After a failed plot to crown Edward 's brother , George , Duke of Clarence , Warwick instead restored Henry VI to the throne .. Henry VI. Henry VI of England. The triumph was short-lived however  : on 14 April 1471 Warwick was defeated by Edward at the Battle of Barnet , and killed .. Barnet. Chipping Barnet. Battle of Barnet. Battle of Barnet. Warwick had no sons .. The elder of his two daughters , Isabel , married George , Duke of Clarence .. Isabel. Isabella Plantagenet, Duchess of Clarence. His younger daughter Anne had a short-lived marriage to King Henry 's son Edward of Westminster , who died in battle at the age of 17 .. battle. Battle of Wakefield. Anne. Anne Neville. Edward of Westminster. Edward of Westminster, Prince of Wales. She then married King Edward 's younger brother Richard , Duke of Gloucester , who later became King Richard III .. Richard III. Richard III of England. Warwick 's historical legacy has been a matter of much dispute .. Historical opinion has alternated between seeing him as self-centred and rash , and regarding him as a victim of the whims of an ungrateful king .. It is generally agreed , however , that in his own time he enjoyed great popularity in all layers of society , and that he was skilled at appealing to popular sentiments for political support .