For two decades, if you sat through any leadership course, you met VUCA. Volatility, uncertainty, complexity, ambiguity. The acronym came out of the US Army War College after the Cold War, and it did a useful job. It told leaders the ground would not sit still, and that the old habit of planning for a stable future was finished.
It still describes the conditions well. But something has shifted in the last few years, and a newer frame names it better. It is called BANI, coined by the futurist Jamais Cascio in 2020. I have started using both, because together they say something neither says alone.
VUCA described the weather. BANI describes how it feels to stand in it.
That is the cleanest way I can put the difference. VUCA looks at the world from the outside and names the conditions. BANI looks at the same world from the inside, from where the leader and the team actually stand, and names how those conditions now behave and feel.
BANI stands for brittle, anxious, nonlinear, incomprehensible. Walk through it slowly, because each word asks something specific of a leader.
Brittle
Volatility said things change fast. Brittle says something harder. Systems that look solid right up until they shatter, all at once, with no warning in between. A supply chain that runs perfectly until a single port closes. A team that holds until one key person leaves. Brittleness hides inside apparent strength.
The leader's answer is not more control. It is slack. Redundancy, reserves, a second way to do the thing that matters most. The strong-looking system with no give is the one that breaks.
Anxious
This is the one VUCA never named, and it may be the most important. People are not just uncertain now. They are anxious. And anxiety is not a mood. It is a decision-making state. Anxious people freeze, defer, over-check, or grab the first option that lowers the discomfort.
The leader's answer here is presence. Not false calm, which people see through, but the steadiness of someone who has done their own inner work and is not adding their own anxiety to the room. This is why I keep saying leadership starts from within. Under anxiety, who you are leaks into every decision your team makes.
Nonlinear
Cause and effect have come uncoupled. A small action produces an enormous result. A large effort produces nothing for months, then everything at once. The proportion you expect between input and output is gone.
The leader's answer is to stop trying to predict and start learning to rehearse. You cannot forecast a nonlinear system. You can build the judgment to read it as it moves and to act before you have certainty. That is a trained skill, not a personality trait.
Incomprehensible
Complexity, in the VUCA sense, is hard but knowable. Put in the effort and you can understand it. Incomprehensible is different. Some of what we now lead through, the behaviour of AI systems, of markets, of large organisations under stress, is genuinely beyond full understanding. The data does not resolve into a clean answer.
The leader's answer is humility, and judgment over analysis. The instinct to gather more information until it all makes sense will fail you, because it will never all make sense. At some point you decide, on incomplete and imperfect understanding, and you own it.
What this actually changes
Here is the shift that matters. VUCA asked leaders to plan harder and think further ahead. BANI asks something different and, frankly, more demanding. It asks you to lead people through conditions that cannot be fully understood or predicted, while they are anxious and the system is brittle.
That is less a strategy problem and more a character problem. Presence under anxiety. Judgment under incomprehension. The nerve to act when the playbook does not apply. These are not downloaded from a framework. They are built, in the person, over time.
It is also why so much of the work I do rehearses decisions rather than only planning them, and why it builds the leader from the inside out. A brittle, anxious, nonlinear, incomprehensible world is not met by a better plan. It is met by a steadier, clearer person at the centre of it.
If that is the kind of leadership you are trying to build, in yourself or in your team, a thirty-minute conversation is the right place to start. No pitch, no pressure. Book one here.