How can we learn from unrequited love?

The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific and philosophical concepts

Why am I a vegan? I do it for my mental health

Vegan restaurants are closing, RFK Jr is sounding the drum for carnivores, and the protein cult is bigger than ever. But eschewing animal products helps me ward off a sense of impotence – and despair, writes Emma Beddington