This book has a good premise – that capitalism can be the SOLUTION to – not just the source of – our sustainability challenges. It has some good ideas as well: environmentalism needs more effective messages than doom and gloom proclamations, for example. Unfortunately it doesn’t come to a very compelling resolution. Porritt advocates for a “new” model of capitalism that incorporates five different types of capital – but it doesn’t seem any more practical than current triple bottom line efforts which have failed to take root. It’s a worthwhile book but I suspect that anyone who reads it is already pretty bought into its message.