[Sethomas]

Actually, Leibniz beat himself up for not being able to answer the question Why does something exist rather than nothing? Philosophers have essentially given up on it, as even the atheist Owen Flanagan asserts.

The conceptualized god is necessary as being any cause that lacks causation for itself. If you want, you could put the Plank-sized nugget in the place of god before the Big Bang, but I've argued elsewhere against the cogency of doing such.