In ancient beliefs, natural disasters were seen as Heaven's response to immoral human behaviour, whereby the conduct of different individuals carried different weights. While the behaviour of common people ranked last, the actions of bureaucrats had a greater effect. Given that in Imperial China the emperor's behaviour was believed to be the most important, popular belief was that the emperor should attempt to prevent disasters by ensuring his conduct was in following with moral codes – and if a disaster should occur, he was responsible for addressing the consequences. According to the Overseas Development Institute, the state-led nature of humanitarian aid in today's China traces back to these traditional beliefs. Chinese believed that natural disasters would foretell the end of a dynasty or the death of a great leader.