I don't know how Leaning Tower of Pisa was made to stand without toppling.

I could look it up, but rather than do that I'll go on imagining that people instead visit towers that don't lean at all, and look upon them with incredible awe - impressed that we can make such tall structures that don't lean, and are generally unaffected by the soft-soil beneath them.

But... do you know how Happiness was defined?