If one tolerates all actions other than those causing harm to non-consenting others (basically “adults can do whatever they want with themselves and with other consenting adults”) which is sort of the traditional maximum tolerance boundary, one will tolerate many practices which, whilst not amounting to causing harm to non-consenting others, do spread intolerance.

From where rises the Paradox that such choice of putting one’s boundary of Tolerance at the maximum level possible actually ends up in aggregate reducing Tolerance.

Making it a social contract reduces the boundaries of tolerance by the minimum amount possible that’s needed to just stop Tolerance from allowing the very tools of its destruction to work.

Under “social contract rules”, at a personal level those who are NOT tolerant of intolerance are, very strictly speaking, being less tolerant, but at a Systemic Level they are actually making there be more Tolerance in aggregate than if they had tolerated the intolerant.

PS: I actually work in Systems Design (amongst other things) and it’s actually quite common for certain ways of doing things which are perfect at the individual level will in aggregate cause systemic problems making the whole function worse, so the optimal choice for the whole is actually to use a less optimal individual choice. Thinking about it, I would say that pretty much all Tragedy Of The Commons situations are good examples of that kind of thing.