This special issue celebrates the career of Youssef Cassis. The introduction will outline his major contributions from his initial work on social characteristics of the financiers of the City of London, and their relationship with landed aristocrats and industry, through his analysis of a succession of financial centres, the comparative study of big business, the relationship between finance and politics, to his new project on the memory of financial crises. Then, we will draw on Youssef's mode of analysis to consider some of the more pressing issues in the era since the global financial crisis and the impact of Covid-19. We will consider the role of central banks, the challenge of fintech, the impact of low interest rates on inequality, savings and debt, and the potential shift in financial centres and reserve currencies with the rise of China. We will conclude by arguing that the mode of analysis developed by Cassis over his long and productive career has never been more pertinent.