the end of the world - and how to avoid it

Check out the Preston model, a kind of co-operative/mutual municipalism:
https://renewal.org.uk/the-road-to-municipal-socialism-the-present-and-future-of-the-preston-model/

that’s all now complemented by an expansion of economic democracy through new worker-owned firms, through cooperative housing projects, through new community land trusts; through insourcing; through work towards the establishment of a regional cooperative bank

Or further afield you've got the Mondragon Corporation, a network of co-operatives in the Basque region of Spain:
https://theconversation.com/the-mondragon-model-how-a-basque-cooperative-defied-spains-economic-crisis-10193

What arose in 1956 as a handful of workers in a disused factory, using hand tools and sheet metal to make oil-fired heating and cooking stoves is today a massive conglomerate of some 260 manufacturing, retail, financial, agricultural, civil engineering and support co-operatives and associated entities, with jobs for 83,800 workers, and annual sales in excess of $US20 billion.