To ensure royal succession for the family line, monarchs seek to have both an heir and a spare (the second son, the backup). Some of the most infamous monarchs of England were born the spare- individuals who never should have ruled England. These never should have been but were monarchs changed history. This raises the question what if the heir survived. How would history have been different if Stephen, Henry VIII, and George III had never been king?
King Stephen: In 1120, a ship carrying the heir to the throne, William, sank in the English Channel leaving Henry I with one surviving heir- a daughter. Although Henry work feverishly to ensure the crown for Matilda, his barons ultimately rejected a female ruler because she lacked the military might expected of medieval monarchs. Upon Henry’s death, Stephen was crowned king sparking a Civil War that only ended with the agreement that Matilda’s son, the future Henry II, would inherit the throne.
What might have happened if William had lived? The throne would have passed peaceful from father to son without a breakdown of law and order. Matilda and Geoffrey of Anjou’s descendants- the Angevin dynasty- would not have ruled England. In addition, without the marriage between Henry II and Eleanor of Aquitaine, English holdings in France would have been significantly reduced. Since John’s expensive military failures in France was one of the major factors of the barons revolt that resulted in the Magna Carta, this document might never had existed (at least not in the same context). Although primarily a conservative document seeking to enforce traditional rights, the Magna Carta’s written restrictions on royal power implied that the king was not above the law- a view that had lasting implications for British government.
King Henry VIII: Although Henry VIII is infamous for his many marriages and separation from the Catholic Church, if his brother had lived, Henry would have disappeared from the historical spotlight. Arthur died from an unknown illness at the age of 15 shortly after his marriage to Katherine of Aragon. After Arthur’s death, Henry married his widow to maintain England’s alliance with Spain and eventually inherited the throne.
How would history be different if Henry never became Henry VIII? Without Henry’s desire for a male heir driving his quest for a divorce, the English monarchy would have little reason to convert to Protestantism. In fact, Katherine’s connections with Spain and the pope would have reinforced Catholicism in the face of Protestant challenge. The centrality of English government likely would have limited Protestant success in England. While English converts to Protestantism might have sought a place to practice their religion, they would have lacked the governmental support given to Puritans making it impossible for them to establish successful New World colonies. It is very probable without Henry VIII, Americans today would be speaking either Spanish or French.
King George III: Although George as the eldest son was in clear line to the throne, the sudden death of his father, Frederick, changed the line of succession so that George was crowned king after the death of his grandfather in 1760. Frederick, known for his extravagant lifestyle and rivalry with his father, died before his father from a ruptured abscess probably caused by being hit by a cricket or tennis ball.
How would history be different if Frederick instead of George was crowned king in 1760? By 1765, George began to exhibit signs of insanity meaning his illness would have been known before he became king- possibly bringing his succession into question or at least weakening his rule. If George never became king, what would have happened with the American colonies? Did Frederick have the political astuteness to avoid or postpone the American Revolution? At first most of the colonial opposition to England was directed toward Parliament and the Prime Ministers, not the king. George’s paranoia, especially around William Pitt, resulted in decisions that intensified instead mollifying colonial anger. In all likelihood, Frederick’s reign would have changed both the political actors and timing of events. Even if the colonies broke from England at a later date, Alexander Hamilton and James Madison would not have been the main framers of the American constitution likely resulting in a completely different structure of government- possibly a system closer to England’s parliamentary structure.