Are there any good economic theories?

Fesneau's theorem, Nash equilibrium theory, Pareto optimality, Langsdon's principle, Luvis's theorem, Tolid's theorem, hedgehog theory, minnows effect, Leibov's law, Rob's theorem, Steiner's theorem, grumbling effect, lightning rod effect, amino acid combination effect, MIG -25 effect, running-in effect, Porter's theorem, Langsdon's law, Gilbert's law and authoritative suggestion effect.