Why did they knock down castles?

Castles were often knocked down for several reasons, including military strategy, political change, and economic factors. After a conflict, victorious forces would dismantle enemy castles to prevent their use as strongholds. Additionally, as warfare evolved and artillery made traditional castle defenses obsolete, many were abandoned or deliberately destroyed. Changes in governance, such as the rise of centralized states, also led to the demolition of castles no longer deemed necessary for control or protection.