Inventions shape the way we live. From communication to transportation, some ideas don’t just make life easier—they redefine it. Some inventions have changed the course of the world. Here are five revolutionary inventions that changed everything for good: The Light Bulb Before the light bulb, people relied on candles and oil lamps. Nights were dark, and productivity stopped when the sun set. When Thomas Edison perfected the incandescent light bulb in 1879, the world never looked the same. Suddenly, people could work longer hours, enjoy...