Question: Richard was born on 2 October 1452 at Fotheringhay Castle, the twelfth of thirteen children of Richard Plantagenet, 3rd Duke of York and Cecily Neville at the beginning of what has traditionally been labelled the "Wars of the Roses", a period of "three or four decades of political instability and periodic open civil war in the second half of the fifteenth century", between supporters of Richard's father (a potential claimant to the throne of King Henry VI from birth)--"Yorkists"--in opposition to the regime of Henry VI and his wife, Margaret of Anjou, and those loyal to the crown ("Lancastrians"). When his father and the Nevilles were forced to flee to Ludlow in 1459, Richard and his older brother, George (later Duke of Clarence), were placed in the custody of the Duchess of Buckingham, and the Archbishop of Canterbury. When his father and elder brother Edmund, Earl of Rutland, were killed at the Battle of Wakefield on 30 December 1460, Richard, who was eight years old, and George were sent by his mother, the Duchess of York, to the Low Countries. They returned to England following the defeat of the Lancastrians at the Battle of Towton and participated in the coronation of Richard's eldest brother as King Edward IV in June 1461.

Apart from Shakespeare, Richard appears in many other works of literature. Two other plays of the Elizabethan era predated Shakespeare's work. The Latin-language drama Richardus Tertius (first known performance in 1580) by Thomas Legge is believed to be the first history play written in England. The anonymous play The True Tragedy of Richard III (c. 1590), performed in the same decade as Shakespeare's work, was probably an influence on Shakespeare. Neither of the two plays places any emphasis on Richard's physical appearance, though the True Tragedy briefly mentions that he is "A man ill shaped, crooked backed, lame armed" adding that he is "valiantly minded, but tyrannous in authority". Both portray him as a man motivated by personal ambition, who uses everyone around him to get his way. Ben Jonson is also known to have written a play Richard Crookback in 1602, but it was never published and nothing is known about its portrayal of the king.  Marjorie Bowen's 1929 novel Dickon set the trend for pro-Ricardian literature. Particularly influential was The Daughter of Time (1951) by Josephine Tey, in which a modern detective concludes that Richard III is innocent in the death of the Princes. Other novelists such as Valerie Anand in the novel Crown of Roses (1989) have also offered alternative versions to the theory that he murdered them. Sharon Kay Penman, in her historical novel The Sunne in Splendour, attributes the death of the Princes to the Duke of Buckingham. In the mystery novel The Murders of Richard III by Elizabeth Peters (1974) the central plot revolves around the debate as to whether Richard III was guilty of these and other crimes. A sympathetic portrayal of Richard III is given in The Founding, the first volume in The Morland Dynasty series by Cynthia Harrod-Eagles.  One film adaptation of Shakespeare's play Richard III is the 1955 version directed and produced by Laurence Olivier, who also played the lead role. Also notable are the 1995 film version starring Ian McKellen, set in a fictional 1930s fascist England, and Looking for Richard, a 1996 documentary film directed by Al Pacino, who plays the title character as well as himself. The play has been adapted for television on several occasions.

Using a quote from the above article, answer the following question: Why did he murder them?
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Answer: 

Problem: David Monroe Shoup (30 December 1904 - 13 January 1983) was a decorated general of the United States Marine Corps who was awarded the Medal of Honor in World War II, became the 22nd Commandant of the Marine Corps, and, after retiring, became one of the most prominent critics of the Vietnam War. Born in Indiana to an impoverished family, Shoup joined the military for financial reasons. Rising through the ranks in the interwar era, he was twice deployed to China during the Chinese Civil War. He served in Iceland at the beginning of U.S. involvement in World War II, and as a staff officer during the Pacific War.

In mid-1943, Shoup was transferred to the staff of Major General Julian C. Smith, commander of the 2nd Marine Division, and tasked to help plan the invasion of Betio on Tarawa Atoll. Shoup's aggressive leadership style would complement the offensive strategy his superiors were seeking in taking the atoll. He was tasked with drawing up initial plans, designating the landing beaches on Betio for the 2nd Marines, and overseeing some rehearsals at Efate. However, after Colonel William W. Marshall, commander of the 2nd Marines, suffered a nervous breakdown before invasion, Smith promoted Shoup to Colonel and gave him command of the regiment, in spite of Shoup's lack of combat experience.  The invasion commenced on 20 November 1943, with Shoup disembarking from Maryland, the flagship for the invasion. His force met heavy resistance on the beaches. His LVT was destroyed by shore fire, and he had to proceed without transportation. As he was wading ashore at around 11:00, he was struck by shrapnel in the legs and received a grazing wound from a bullet in the neck. In spite of these wounds, he rallied the Marines and led them ashore. He was able to coordinate the troops on the beaches and organize them as they began to push inland against an anticipated Japanese counterattack. He continuously organized aggressive attacks on the defenders, and was noted for his bravery and vigour during the conflict. On the second day of the attack, he organized an advance inland, despite heavy casualties among the American troops. By the afternoon, they were winning the battle, and reinforcements began to arrive in force. That night, Shoup was relieved by Colonel Merritt A. Edson, the division's Chief of Staff, who commanded the 2nd Marines for the remainder of the campaign. Six years later, Shoup made a cameo appearance in the movie "Sands of Iwo Jima" reprising his actions that first night on Tarawa, although he had originally been brought onto the movie as a technical advisor.  For his leadership during the assault and the push inland Shoup was awarded the Medal of Honor and the British Distinguished Service Order. For his role in planning the invasion he was awarded the Legion of Merit with "V" device. He also was awarded the Purple Heart for the combat wounds he suffered during the course of the campaign. Ten years after the assault, Shoup remarked of the operation, "there was never a doubt in the minds of those ashore what the final outcome of the battle for Tarawa would be. There was for some seventy-six hours, however, considerable haggling with the enemy over the exact price we would have to pay." In 1968, he returned to Tarawa to dedicate a memorial to the battle and to the American and Japanese troops who had died there.

What was his input in the plan?

Answer with quotes:
Shoup's aggressive leadership style would complement the offensive strategy his superiors were seeking in taking the atoll.