In theory, with the internet, civilization could go back to full decentralization. You need writing, printing, sanitation and food production to aggregate human

In theory, with the internet, civilization could go back to full decentralization. You need writing, printing, sanitation and food production to aggregate humans in cities to create a human network. With the internet, people can be hunter gatherers and spread all over the world and still pool their knowledge to maintain the infrastructure. You still need electricity and machines, but the internet links it all together. *edit: changed web to internet, along dgellow's comment