Who Taught The Doctrine Of Sunyata?

Who Taught The Doctrine Of Sunyata? Although the concept is encountered occasionally in early Pāli texts, its full implications were developed by the 2nd-century Indian philosopher Nāgārjuna. The school of philosophy founded by him, the Mādhyamika (Middle Way), is sometimes called the Śūnyavāda, or Doctrine That All Is Void. Who among the following taught the