The cause or origin of the Big Bang is still a subject of scientific inquiry and is an active area of research. While there are various cosmological models and hypotheses, our understanding of the exact cause of the Big Bang is currently limited. It's important to note that scientific theories and models aim to explain natural phenomena based on empirical evidence and testable hypotheses.
The concept of an infinite regress, where each cause is preceded by another cause, is one way to approach the question of causality. However, an infinite regress can lead to logical difficulties, as it implies an endless chain of causes without a definitive starting point.
It's worth noting that the question of what caused the universe or the Big Bang assumes that causality, as we understand it within the framework of our universe, can be applied to the origin of the universe itself. However, at the moment of the Big Bang, the laws of physics as we currently understand them may not have been applicable, and the concept of cause and effect as we know it may not have the same meaning.
Some scientific hypotheses and cosmological models propose explanations for the origin of the universe, such as inflationary cosmology or the concept of a multiverse. However, these ideas are still subject to ongoing research, and scientists continue to explore and refine our understanding of the early universe.
It's important to approach questions about the origin of the universe with humility and recognize that our current knowledge is limited. While scientific inquiry can provide valuable insights, it may not provide definitive answers to philosophical or metaphysical questions about ultimate origins or causes.