There are more fundamental questions here than just UBI. For the past 30,000 years, mankind has settled, and formed civilization amongst ourselves predicated on the notion that specialization and trade increases yields for the society as a whole. 1 guy can make more bread full time than 5 guys who only make the bread they need. This is the first economic principle of economies of scale. As time went on, the need for general purchasing (armies, ships, government coordination, central planning, etc...) meant that standard units of value had to be made, so that the trading can become coordinated and standardized. Money was born, and the price system itself was created. It was the first form of middleware. Suddenly you could trade with whole horses of people all around the world, using money and the price system in free markets to coordinate. When you buy a laptop, you trade a portion of your skill and profession for some plastic, some metal, some silicon, some machine time, design, manufacturing, standards, IP, etc... to bring you a laptop. You traded with hundreds of thousands of people to bring the laptop to you. That price system, and the money system that backs it, is the basis for today's global civilization and economy. The best value propositions won the market and were in demand to trade. Now, I don't want to trade with you. I want to trade with a machine that has a better value proposition than you do. The problem is, there's a machine that has a better value proposition than me. The net effect is that our trade-based system is breaking down. The old basis for civilization no longer functions. So to does the need for people. The more people I had to trade with, the more value I got for my profession. Now that paradigm is going away. We need instead more machines and less people. This raises ethical questions. How many people do we need? Should we still incentivize child-rearing? Should we still allow unlimited population growth? We don't need more people. For the health of the environment and sustainable living, we need less. But what replaces trade and money? I don't know the right answers, but I think that we have to frame the question correctly before we solve it.