The world does not need Facebook. If Facebook went away, people would use another service to find and communicate with businesses. Businesses would use another

The world does not need Facebook. If Facebook went away, people would use another service to find and communicate with businesses. Businesses would use another service to be found and be communicated with. But today, people need Facebook because businesses (and other people) use Facebook and businesses need Facebook because people use Facebook. Facebook is completely replaceable for society, but that doesn't make it less critical for many individuals.