Perfect designs are those which allow you to design around the Unknowable. Nuclear programmes, dams and in fact modern civilisation transgress rudely this principle driven by greed. We reap what others sow: The Three Mile Islands, the Chernobyls, the Fukushimas and others on the drawing board. Dams cumulatively by direct heating up of the earth cause earthquakes and tsunamies and climate change. Live contented with what you can do without perfect mass murders by realising you are part of nature.