The general premise is that the smaller companies allows competition to enter the market. It is precisely because of this competition that the smaller bells all failed - because they were still stuck in the mentality that they needn't compete, whilst also lacking the resources to drive the competition out of town (e.g.: lobbying, buy them out, etc.). They didn't control the whole chain, anymore.

That's supposed to be the idyllic of the capitalist system, yeah?

I'm genuinely not trying to be contrarian, here, but trying to understand how breaking up a monopoly, such as Bell, didn't have any direct consequences on the territorial monopolies.

For example, if Bell had an agreement with 'x' area that they were the sole provider in that area, then as soon as they were no longer Bell, that monopoly agreement essentially hit dissolution, yeah? In principle, that should have an almost immediate net-positive effect on the area, I would think?