Responsible investment is going through a period of rapid change, from voluntary to mandatory, with regulators working to tackle greenwashing, investors responding to client and savers demands, a proliferation of new sustainability themes and increased focus on real-world impact. Responsible investment is also ‘growing up’. And part of growing up is acknowledging limits and complexities, and making difficult decisions. Responsible investment has got this far by sticking to the script and not talking about the awkward bits in public. But this is no longer an option, and so it not surprising that it draws its critics. Part textbook, part briefing, part storytelling, this book is a personal and accessible account about the growth of an industry, what it got right, what it got wrong and if responsible investment is to matter, where we go next.