The Law of Cause and effect is similar to people's ancestors causing them. How can there be an infinite regress? There has to be a first cause or an uncaused cause that created that first effect.
Even the founder of the Goddard Institute for Space Studies at NASA, implied that the universe can't be an effect without a cause. Charles Darwin said I am aware that if we admit a first cause, the mind still craves to know whence it came, and how it arose. According to the law of cause and effect, it is irrefutable that everything that has a beginning has a cause, including the universe. The universe (an effect) cannot simply bring itself into being. It requires a cause that is outside itself.
Causality isn't actually a law in the sense that you think it is.
Uncaused events happen in quantum mechanics all the time.
Furthermore, causality is a
phenomenon IN the universe. It requires temporal conditions to manifest. Because causes happen BEFORE effects. So causality is dependend on the flow of time. If there is no flow of time, then there is no causality.
Time is a property / dimension of the universe. No universe = no time.
A "cause" of the universe would have to happen BEFORE the universe. But there is no "before" the universe, because there is no time for that "before" to take place in.
It's like talking about "north of the north pole".
When you go back in time and reach the beginning of the universe, you have reached the beginning of time. There is no "before" the beginning of time. So there is no temporal frame in which a cause could happen.
So to talk about a "cause" of the universe, is technically nonsense.
We do speak about a "cause" to refer to whatever process originated the universe, because we have to use words to communicate our ideas and as we are beings that live in a space-time continuum, we have no language to accomodate for such atemporal conditions. But keep in mind that the concept of actions happening "before" the universe, is by itself somewhat nonsensical.