What explains the change in the views of Alexander the First after the Patriotic War of 1812?

Alexander I’s views on the conduct of politics changed. The emperor deviated from liberal reforms and began to develop reactionary activities. There are several reasons for Alexander’s change in views. After a trip abroad, he realized that Russian society was not ready for drastic radical changes. Life in European countries was different from Russian. Alexander concluded that Russia is too distinctive a country. He also questioned the ideals of foreign educators. After 1816, reaction began in the country.