Sarvastivada is an ancient Buddhist school that held the philosophical view that all dharmas (phenomena) exist in the past, present, and future. The name itself translates to "the theory of all exists," reflecting their core belief that elements of existence are not fleeting but have a kind of ontological reality at all times. This perspective was distinct from other early Buddhist schools, which often emphasized the impermanent nature of phenomena.
The significance of Sarvastivada lies in its comprehensive Abhidharma literature, which systematized the teachings of the Buddha into detailed analyses of reality. This school contributed to the development of complex theories about time, causation, and the nature of existence, influencing subsequent Buddhist thought and debate. Understanding Sarvastivada matters because it provides insight into how early Buddhists grappled with profound questions about reality and existence, laying down a rich tapestry of thought that would echo through centuries of Buddhist philosophy.