What are the simplest inventions that changed the world?

From ancient tools to the latest digital advances, human inventions that changed the world and transformed life on the Earth. ... In addition, Samuel Morse developed a code, called Morse code, for the simple transmission of messages across telegraph lines. read more

But sometimes, it's the simple technologies that truly change the world. Think of what pasteurization did for public health or what mechanical clocks did for, well, time. These unheralded inventions maybe don't appear incredibly complicated at first glance, but they nevertheless improved the lives of countless people. read more

From a wheel-shaped water container for the developing world to a lamp powered only by gravity, these seven inventions are saving lives through simplicity. Simple innovations saving the world 1. read more

While remembering the wheel as the most crucial invention that changed the world, I don’t consider it to be the simplest invention. I am referring to my previous answer around the same topic and feel Barter System to be the simplest world changing event. read more