Free energy made available to all would almost instantly devastate the planet...

7 billion people with abundant free energy would destroy the ecosphere from overexploitation and resource-depletion in a few years. Not to mention that the ongoing population-explosion would intensify immensely...

And what about warlords and underdeveloped areas plagued by ethnic conflicts and strife... Drop some free energy devices among them, and they'll soon be weaponised and used to wreac havoc.

Free energy with todays mindset, population and systems, would be an instant catastrophe.