The world is demanding more and more of organisational leaders. The world wants more transparency, to see the truth about how organisations are performing. And not just for profit, but for people and the planet. And the world wants more accountability, that leaders should be held responsible for the performance results of their organisations. There will be many leaders kept awake at night by the panic of what transparency might reveal about the organisations true performance, of how exactly they might be held to account for that, and how unfairly this might play out. The best leaders wont be panicking. The best leaders already know how their organisation is performing, for profit, people and the planet. They know that performance has improved under their leadership, and they can prove it because they measure it. They can prove it because they practice evidence-based leadership.