Over the past three decades the financial system has exploded in size and importance. Markets now act as the central hub of an exploitative system that demands unlimited economic growth, stretching people and planet to a breaking point. Rather than losing strength after a financial crisis that sparked economic instability and recession across the globe, the power of financial institutions has only increased since 2008. Yet, despite its social importance, the financial system appears incomprehensible for the vast majority of citizens. This booklet published by Corporate Watch aims at contributing to a popular understanding of the banking and finance sector and its vast role in society.