The influential factors in causing disasters and the role of justice of God from Quran and traditions point of view

the goal of testing prophets and infallibles with difficulties and hardship is their merit To reach higher grades. But the goal of testing usual people is reminding, punishment or atonement for their sins which cause their elevation. Therefore, misfortunes and problems put human beings in the way of perfection or decadence to distinguish good from bad. In this way claims and motos will fade and degree of patience will be clarified. In this article, the causes of hardship based on Quran and Traditions are explained to clear are hardship from God and are they compatible with His justice or are they caused by human beings? and what are the most significant elements in causing disaster?