PART 10: As a social entrepreneur, you need to be a bit of a maniac to think your unreasonable ideas will succeed. Just as vital, though, is an “inner minder”, who can tend to the boring but vital stuff – and tell the maniac to slow down sometimes.

PART 9: Leadership can be deeply fulfilling – but if the buck stops with you, you’re on your own. The key is knowing that bouts of intense isolation and loneliness don’t make you a bad leader. And if you expect it, you can find ways to deal with it.

PART 8: How do you handle a workplace drenched in sexism? Liam Black – who is himself still “unlearning the misogyny” that shaped his formative years – shares strategies taken by some of his female mentees. Plus: why men need to step up.

PART 7: If you're a purpose-driven leader, you're likely to face resistance from people with a very different agenda to yours. From bullying bosses to game-playing business partners: how do you avoid getting drawn into the drama?

PART 6: “He said, she said” arguments, an interfering chair, and colleagues like a “bag of ferrets” – long-time mentor Liam Black has seen it all. So do the work to know who you are as a leader, and how you want to exercise your authority – or expect trouble. 

PART 5: “This should be one of the highlights of my career... but I'm hating it.” Liam Black recalls what it took to walk away from a top job with Jamie Oliver's Fifteen restaurant – and explains why finding the right “platform” for your purpose is vital.

PART 4: If you want to change the world through your business, at some point you'll need the courage to jump into the unknown – even when there are “bloody good reasons not to do so”. Imposter syndrome should not be one of those reasons.

PART 3: The world is full of “charlatans, greenwashers and Instagram lifestylers” keen for social change – as long as they themselves don't have to change. If you think you can solve the world’s problems, be brutally honest about your ‘why’.

PART 2: Shallow self-knowledge about what's driving you will crumble quickly when you face resistance. So: why you? Why do you care? Tough questions from the gloves-off mentor for aspiring social entrepreneurs.