Technology is suppressed eithe by big business or government. Some examples I know first hand is a battery that works on nuclear waste that lasts 500 years. Engines that split water molecules and run on oxygen and hydrogen. Something called a rail gun that shots pulses of a laser. Guns that can only be shot by the owner that read DNA. There are several more. There are medical and agricultural invention that can better humankind and still remain unused because that some bean counter want to profit as much as they can from the current innovations.