Internet

The Internet is probably the most well known invention in the history of the world. I don't think it would be even possibly to find someone who has never heard of it. It is the device that connects us through the world. The internet isn't even an object. It's basically a thundercloud, information being zapped all over the world through lightning. In a split second you could be talking to your cousin in Australia or reading about the politics of Russia. Society is so dependent on the internet, our world would have a meltdown if it were to ever be shut off. It acts as the biggest plug for any sense of media.