We are living through an unprecedented moment of multiple crises. Tens of millions more people are facing hunger. Hundreds of millions more face impossible rises in the cost of basic goods or heating their homes. Poverty has increased for the first time in 25 years. At the same time, these multiple crises all have winners. The very richest have become dramatically richer and corporate profits have hit record highs, driving an explosion of inequality. This report focuses on how taxing the rich is vital to addressing this unprecedented polycrisis and skyrocketing inequality. The report explores how, in recent history, taxation of the richest was far higher; how talk of taxing the rich and making billionaires pay their fair share is hugely popular; and how taxing the rich claws back elite power and reduces not just economic inequality, but racial, gender and colonial inequalities, too. The report lays out how much tax the richest should pay, and the practical, tried and tested ways in which governments can raise such taxation. It shows us how taxing the rich can set us clearly on a path to a more equal, sustainable world free from poverty.