Readers reply: can you acquire courage?

The long-running series in which readers answer other readers’ questions ponders how to overcome fear and do what is neededThis week’s question: what would be the most socially useful way to spend a billion dollars?Is it possible to acquire courage if you don’t have it? I was moved by the recent story of the Australian boy who swam to land for several hours in rough waters to raise the alarm that his mother and siblings had been swept out to sea. Despite his exhaustion, he then