Reverse speech. In the latter days of Earth, before it exploded into the shards and stones of the new asteroid belt that surrounds the sun in place of the old orbiting planet. The science of reverse speech had been a vanguard of the increasingly peaceful society that had inhabited most countries.
For those that may not know, science had discovered that all people, everywhere, spoke two distinct languages simultaneously. One language, the conscious spoken word, is understood with the left brain and the conscious mind; the other, spoken in metaphors and emanating from the right brain, and in reverse, happens simultaneously and is understood subliminally. The information dispensed from the right brain appears in the conscious mind as intuition.
One of the benefits of this discovery was the increasing inability for people to lie to each other. There was no way to squelch the intrepidly truthful right brain and as people learned to pick up the intuitive information as second nature, duplicity became impossibility.
Conversely, Mother Nature became more and more erratic. As mankind became more ordered and peaceful, the planet frayed at the edges. The whole earth became hotter and hotter each summer. Tornadoes became unseasonable and flooding forced entire countries to take up residence with their inland neighbors. The same science that had tamed the devil within mankind could find no answer to the dissolution of the planet.
The only answer was to build environmental cones over major cities and huge anti-gravitational complexes beneath the city streets. Once finished, these flying cities lifted off from the bosom of their mother as the inner core of the earth exploded.