how to make a perfect world or save the world: replace all taxation with land rent.
To make
this planet

Only reward governments
if they improve the world.

(At present they can take any taxes they
want, regardless of what they do.)
It's simple: measure the value a government creates:
i.e. what will people pay simply to live under them?
i.e. what is the price of bare land (without houses etc)?

(If they charge more they're not worth it, by definition.)
So tell your member of congress
(or parliament) to end all taxation
and replace it with ground rents.
(Gently, just a little at a time, and compensate
land owners with generous bonds
funded by future growth.)

the economics     the numbers