Actually, war does increase income for suppliers not in the war zone. As an extreme example, World War 2 ended the Great Depression in the U.S.<p>The mechanism is that there&#x27;s work to be done and someone is willing to pay for it. As you say, this doesn&#x27;t happen automatically, but there a lot of people trying to build businesses that increase consumer spending. Sometimes they succeed.<p>Expanding a business often does require more energy use, but this isn&#x27;t linear. Today&#x27;s businesses are much less energy-intensive than they used to be. The bad news (sort of) is that they tend to be less labor-intensive as well.