The early twenty-first century doesn’t feel like a promising time for an optimistic book when we are faced with the challenges of climate change, the rise of fascism and the emptiness at the heart of our consumer society. But now looking back at his life and inspired by the struggle of so many women and men for a better world, Peter cannot believe that it has all been for nothing. There may be no way of knowing for certain that the world has some ultimate meaning and purpose, but finding reasons to believe changes everything. Peter identifies as a Christian agnostic. “I don’t know there...