Why did the death of Charles II of Spain spark a European war?

Charles II was the last Habsburg king of Spain, ruling from 1665 until his death in 1700. Because he suffered from lifelong ill health and died without children, his succession became a central dilemma in European diplomacy. His choice of Philip of Anjou as heir threatened the continent's balance of power, leading directly to the War of the Spanish Succession.

What we know

• Charles II of Spain lived from November 1661 to November 1700 and was the final member of the House of Habsburg to rule Spain. [1, 2]
• His death without children triggered the War of the Spanish Succession, which lasted from 1701 to 1714. [2]
• The leading candidates to inherit the throne were Charles of Austria and Philip of Anjou. [2]
• Shortly before dying, Charles named Philip of Anjou as his heir. [2]

Still open

• The exact reasons for Charles's lengthy periods of ill health throughout his life remain debated by historians.

Where to go next

• what caused itWhat caused the War of the Spanish Succession?
• the bigger pictureWho were the Habsburg rulers of Spain?
• how it workedHow did European diplomacy handle royal successions?
• how we knowWhat documents recorded the last will of Charles II?
• compared withHow does Charles II compare to his contemporary Charles II of England?
• an unexpected connectionHow did a Spanish king share a name and era with an English monarch?While Charles II of Spain faced a succession crisis leading to continental war, his contemporary Charles II of England navigated the English Restoration and secret treaties with France.

Sources

• [1]Charles II of Spain (Wikidata Q36174) · CC0 1.0
• [2]Charles II of Spain · CC BY-SA 4.0
• [3]Charles II of England · CC BY-SA 4.0
• [4]Charles IV of Spain · CC BY-SA 4.0
• [5]Philip II of Spain · CC BY-SA 4.0