Madhyamaka was founded by Nāgārjuna in the second century CE. Its method is to show that every position about the ultimate nature of things, existence, non-existence, both or neither, leads to contradiction, leaving emptiness, which is not a further position. It became a foundation of Tibetan and East Asian Buddhist philosophy.
Madhyamaka
The Middle Way school of Nāgārjuna, which teaches the emptiness of all things through rigorous dialectic.
Also: Madhyamika, Middle Way school