Step 1: Understanding the Concept:
The doctrine of Sunyata (Emptiness) is the cornerstone of Mahayana philosophy, specifically the Madhyamaka school founded by Nagarjuna.
Step 2: Detailed Explanation:
Nagarjuna (c. 150–250 CE) used the concept of Sunyata to explain that all phenomena are empty of "intrinsic nature" (svabhava) because they arise dependently.
While early Buddhism used emptiness to describe the lack of a "self," Nagarjuna expanded it to mean that all concepts and objects lack independent existence.
This school is a major pillar of the Mahayana tradition.
Step 3: Final Answer:
The Mahayana school is associated with Nagarjuna's doctrine of Sunyata.