Nagarjuna

Nagarjuna was the first Buddhist thinker who attempted to systematize Buddhist belief. He wrote extensive commentaries on the the Prajna-Paramita Sutra. He probably lived during the second century ce. Although he founded a Mahayana school, the Madhyamikas, his systematization was much more important, being used by many Mahayana schools and as one of the intellectual bases of Vajrayana Buddhism.