The world faced numerous crises in 2022, and overcoming the biggest of them is going to be an immense, long-term challenge. The UN Foundation listed a few of the most pressing, covering topics from poverty to pollution, environment to equality. The greatest concerns are protecting the environment and addressing global poverty, both of which impact billions of people. But humanity is nothing if not ingenious. Necessity, as they say, is the mother of invention, and humans have been inventing things to solve problems for as long as humans have existed on Earth. Britannica highlights several inventions in the past, dating back millennia, which have revolutionized our way of life and quite literally changed the world.