Ha, yeah if you wanted to get 100% materialistic about it, it would be forces, plural. Although sometimes I like thinking, like if you zoomed all the way out and watched the whole universe sped up it would look like just one big explosion starting from the big bang (we are still exploding outward just the expansion is more slow). So was it one force or multiple that started the big bang or does the word "force" lose meaning that far back. So I guess whatever that force was might not still be acting on us directly but the effects of it are throughout the whole equation. If that makes sense, might be a stretch haha.