The Variance

https://entrepreneurofimpact.org/2026/douglas-katz I've worn a lot of hats in my life. West Point graduate. Veteran. Entrepreneur. Inventor. But the one that drives me every single day? Problem solver. That's what NULU is. A solution to a problem that millions of people face and almost nobody talks about — the moment when physical limitation robs you of something as fundamental, as joyful, and as deeply human as cooking your own food. The Idea That Became a Mission Three year

We need to start thinking about what can go right with AI and who it can help. Much of the public conversation about artificial intelligence revolves around replacement. The argument tends to fall into one of two camps: either AI will replace human thinking, or it will diminish the value of human work. The framing assumes that the central question is substitution. But from where I sit, that isn't the most interesting aspect of what these tools are doing. The more compelling d

Sometimes in life, roads don’t fork. They intersect. Recently I stepped back onto an Aikido mat after several years away. Within the first few training sessions — most of which ended with me on the floor, where I seemed to be spending more time than I remembered — I realized something that should probably have been obvious much earlier. Getting up after being thrown took longer than it used to. A lot longer. And the getting up was just the beginning. I also found immense j

Knives are some of humanity's oldest tools, symbols of survival, culture, and even spirituality. From the first stone tools to today’s sleek chef's knives, they tell the story of our ingenuity. But here’s the thing—people are deeply attached to what a knife looks like, whether it’s in the kitchen, on the battlefield, or as part of a collection. Sometimes, that attachment is purely aesthetic, tied to the way a knife embodies tradition, craftsmanship, or even a sense of identit

I recently had the opportunity to join Chris Moore of Aging in Place Is a Team Sport for a conversation about aging, independence, adaptive design, caregiving, and the reality that ability is not binary. It’s a curve. We covered a lot of ground, but the heart of the conversation was simple: most people do not think about adaptation until it becomes personal. That might happen through age, injury, caregiving, fatigue, or a sudden change in health. But when it does, the proble

Aikido as a counterbalance to my chaotic mind My brain runs wide. Always has. But last weekend I deliberately walked into a room where that would get me thrown on the floor. I stepped onto an Aikido mat for the first time in years. I had visited a few seminars over that time and checked out different schools, but this felt different. I wasn’t drawn back because I suddenly missed the martial aspect. I was drawn back because I realized I needed something structured in my life a