There are a lot of things the Internet makes better. Instant communication around the world is a good thing for keeping families and friends in touch. Businesses can use telecommuting to save on building overhead, and employees to save on fuel.
With a simple online search, you can learn just about anything you ever wanted to know on any topic. The entire history of human knowledge is at your fingertips. So, why are some experts saying the Internet is humanity's biggest threat?
I'll tell you right off that this isn't a cynical, "the Internet rots people's brains and makes them unable to function like normal humans" theory. That's been said about radio and TV as well, and while there's some truth to it, people are still people.
No, experts have a different concern about the Internet. Namely, it can bring down governments, crash economies, start World War III and even replace the entire human race.