The entire concept of Buddhism lies in the teachings of Lord Buddha, that He preached to His disciples after attaining enlightenment in 528 BCE in BbodhGaya. After the mahaparinirvana of Gautam Buddha(483 BCE), the whole phase of the timeline of Buddhist history went through various ups and downs. The division of Buddhism into various sects, arrival of Islam in India and other parts of the world, the revival of Hinduism and the Bhakti movement - whatever it had to be, though slowed down the pace of Buddhism for a time being, but could not put an end over it permanently. The existence of Buddhism in today's stage of life proves that the Buddha's teachings still have relevance in our lives.
Buddhism is a philosophy based on the teachings of Lord Buddha(563 BCE-483 BCE), who was born as Siddhartha Gautama, a Shakya prince in Lumbini, Nepal. The teachings preached by Lord Buddha subsequently turned into a religion, known as Buddhism.
The core of Buddhism lies in the purification of mind and soul by realising the truth and getting rid of the worldly desires. Basically, it were the principles of Karma in the doctrine of Buddhism that made the religion one of the major ones in the world.
Buddhism After The Buddha - The role of Ashoka
It was after the Buddha's death that the school of Buddhism spread slowly in India and then subsequently, throughout the world. However, it was at the time of the the Indian emperor Ashoka that Buddhism took a pace to reach its height. After the tragic Kalinga war, Ashoka decided to follow the path of non-violence or 'ahimsa' and converted to Buddhism. He promoted the doctrines of Buddhism not only in his empire as Dhamma but in other regions as well. It was his promotional campaign that led to the construction of the Buddhist religious monasteries and stupas, which further facilitated the spread of Buddhism in countries like Sri Lanka, Tibet, China and Japan.