Atheism, at its core, is simply the absence of belief in a god or gods. It does not provide a single unified explanation for the existence of the universe. Atheists can hold a variety of views and provide different explanations based on their understanding of scientific theories, philosophical perspectives, and personal beliefs.
From a scientific standpoint, atheists often turn to explanations rooted in naturalistic principles. The prevailing scientific theory on the origin of the universe is the Big Bang theory, which proposes that the universe originated from a singularity. While the exact cause of the Big Bang is still unknown, scientists continue to investigate and explore various hypotheses.
One possibility is that the universe emerged from natural processes that do not require the existence of a god or any supernatural intervention. Some hypotheses propose that the Big Bang could be a result of quantum fluctuations, the collision of multiverses, or other yet-to-be-understood phenomena. These explanations are based on scientific observations, mathematical models, and ongoing research in fields such as cosmology and theoretical physics.
It is important to note that atheism, as a lack of belief in a god, does not inherently require atheists to provide a comprehensive explanation for the existence of the universe. Atheism is primarily a response to the claim that a god or gods exist. While some atheists may delve into cosmological and scientific theories to explore the origins of the universe, atheism itself does not offer a single, definitive explanation.
Ultimately, how atheists explain the existence of the universe can vary greatly, ranging from scientific explanations to philosophical perspectives that do not invoke the concept of a god. It's important to recognize that atheism is a diverse position, and individual atheists may have different views on this topic.