The Choson dynasty was founded by the gentry and the military during a period of crisis and confusion which ensued in the 14th century. The leaders advanced Confucian political ideology and propelled a policy of stabilization for the creation of a nation and a powerful army.
In the beginning of the 15th century, a Confucian and Yangban(aristocracy)-centered system was firmly established and industry developed with the propagation of a policy of agricultural development and welfare of the people. Thus, social and economic stabilization were achieved. The national spirit was heightened and national strength expanded. Based on these, national culture bloomed.
In the 16th century, philosophy flowered, but due to splits within the ruling class, the national defense was weakened and Choson fell victim to invasions by the Japanese warlord, Hideyoshi, and also the Manchus. Through the Hideyoshi invasions, a lot of Choson's culture was introduced to Japan.