The Slave Dynasty was a short-lived dynasty in the history of India. It was established by Qutb-ud-din Aibak in 1206 after the death of Muhammad of Ghor and lasted for about 35 years. There were several factors that contributed to the decline of the Slave Dynasty:
1. Lack of a strong centralized government: The Slave Dynasty was not able to establish a strong centralized government. The rulers were often at war with each other and with neighboring kingdoms. This led to political instability and a lack of control over the empire.
2. Mongol invasions: The Slave Dynasty faced several Mongol invasions during its rule. The Mongols were a powerful nomadic people who were able to defeat the Slave Dynasty's armies and capture parts of the empire.
3. Economic problems: The Slave Dynasty was also facing economic problems. The empire was heavily dependent on agriculture and trade, but these were disrupted by the Mongol invasions and political instability.
4. Rise of the Khalji Dynasty: The Slave Dynasty was overthrown by the Khalji Dynasty in 1290. The Khaljis were a powerful Pashtun tribe who were able to defeat the Slave Dynasty's forces and establish their own rule.