The Primal Cause is based on a flawed premise, though. Time is only linear from our perspective, not objectively throughout the universe, thus the Primal Cause is unnecessary because there could be a never-ending circle of life, as it were.
As to how I myself was caused to exist, you see, when a man and a woman get their hormones all riled up ...
Sorry Kelly, but time is an accident of matter in motion. All is an accident of matter but as long as matter does not move, time is nonexistent. For instance, put a marble on the top of a hill and tell me how long does it take for that marble to reach the bottom of the hill. You don't know; no one knows as long as the marble does not move down. Se cannot measure time in inertia.
Now, regarding the Primal Cause as you claim above, is unnecessary, were It unnecessary, the Universe would not exist and we would not be talking today with each other. And for an end to the cycle of life or of matter, the opposite is rather true that indeed, there is an end to it. It had its beginning in the Primal Cause, got into a cycle of evolution and expansion and reaches its end in itself. But life continues, hence evolution and expansion which are akin to each other.