What are the main changes in the attitude of the state and the church that took place in the 18th century?

In the 18th century and in many states, the role of the church declined. This was due to the development of scientific knowledge and the renewal of culture. Religion has ceased to occupy prominent places in Russia. In the 18th century, the era of Palace coups began, during which leaders often carried out contradictory reforms. At this time, the secularization of the lands and possessions of the monasteries was carried out. In education, secular schools and natural science institutions began to occupy an important place for the education of children of the upper classes, and then of commoners.