Early schools of Buddhism would have been in agreement with Epicurean atomism.
Here is an overview, with regard to the material existence of things:
In Buddhist philosophy, the question of whether matter exists is traditionally broken down using four main philosophical schools that developed in classical India. These schools range from robust realism to radical idealism.
The Realist Schools (matter exists externally and objectively):
1. The Vaibhāṣika School (Direct Realism) - the physical world is objectively real and exists independently of the mind. They argue that matter (rūpa) is composed of indivisible, tiny particles akin to atoms. “the Vaibhasika maintains direct perception of the external objects...” This means when you look at a tree, your eyes are making direct contact with the actual, physically existing matter of that tree. (This school of Buddhism is an ancient historical tradition that no longer exists as an independent, practicing religious sect in any modern country, though its philosophical tenets are still studied today, primarily in Tibetan Buddhism) read about its history here.
2. The Sautrāntika School (Indirect Realism) - also affirms that the physical world exists, but they disagree on how we experience it. Rather than perceiving matter directly, they argue for a representative theory of perception. “One first becomes aware of a mental image, caused by contact between a sense faculty and an external object and resembling it, and from this awareness infers the existence of an external object.” Essentially, matter exists, but the mind only interacts with a "mental photograph" generated by that matter. (This school is no longer in existence, read about its history here).
3. The Theravāda School (Modern Orthodox Realism) - believe the material world is real but strictly bound by the laws of cause and effect (Pratītyasamutpāda). Matter is categorized into physical phenomena (rūpa) that possess specific, changing qualities like solidity, cohesion, heat, and motion.
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The schools that reject the existence of independent matter:
1. Yogācāra (Mind-Only) - Idealism: The external material world is an illusion; only consciousness is real.
2. Madhyamaka (Middle Way) - Emptiness: Matter exists conventionally as an illusion, but lacks any independent, permanent essence.
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The Dalai Lama suggests that both science and Buddhism can inform each other. While science seeks to understand the external world, Buddhism provides insights into the internal experiences of consciousness. This complementary relationship allows for a more holistic understanding of existence.
QuoteBoth science and Buddhism share an inquiry mindset marked by a deep curiosity and commitment to investigate the fabric of reality as it is, rather than what we hope it might be.2 Indeed, His Holiness has referred to the Buddha as an “ancient Indian scientist.” Science and Buddhism also share a willingness to let go of long-held beliefs when new evidence diverges from existing models or theories.3 For example, while Buddhism values scripture and ritual, the Dalai Lama asserts4 that scriptural authority should not outweigh knowledge gained through experience and reason.