So a society is rational if the institutions are rational … and an institution is rational if its outputs seem rationally designed … which is judged by a rational individual … which is still hard to define.
I see your point and agree that there is room for improvement. Instead of “more rational” I would propose “less insane” which seems to fit the evidence as good as the other description.
Will one of these more insane societies become less insane by making sure everybody on the streets is less insane? The connection doesn’t seem obvious, except in extreme cases.
The connection between rational individuals and rational society is implied by use of the same word and only obvious in extreme cases.
Just, that there is no obvious mechanism that produces a more rational society from more rational people.
Again I agree on the positive effects of rationality and do believe that more rationality will improve society. But there are many people that say the same about religion, obedience or other things that I don’t view as positive.