There must have been a starting point. A First Cause. A Supreme Being. A Creator.
To almost quote Roseanne Roseanna-Danna, "There's always something...if it's not one thing, it's another."
What seems to be the likeliest story is that, to the extent that it's meaningful to speak of a universal time in the multiverse, there was never a time when there was nothing, a complete absence of physical being of one sort or another. And, from this perspective, if one waits long enough, pretty astonishing things can (and will) happen. It's likely that there was never a time when this wasn't true nor will there ever be a time when this won't be true.
Not that we'll be around to judge the matter.
The multiverse is an interesting model. When the Big Bang was first proposed, it was met with a great deal of resistance, precisely because it postulated a beginning. The Multiverse model is an attempt to get past the idea of a beginning and restate the Steady State theory, just on a larger scale. Instead of the universe remaining essentially unchanged with stars forming and dying, the Multiverse now remains essentially unchanged with universes forming and dying.
"For the sake of argument let’s assume that the universe happened by accident just as many so-called scientists claim. With this as a starting point we can make the assumption that there was a source of crude matter from which all things, living and not living, evolved. There’s no point in bogging you down in physics. We’ve all read the theories in high school."
One can only assume this is the author's subtle way of informing his readers that he never made it to college.