Ingrid Newkirk was 54 when she thought she was going to die in a plane crash. It was late summer and the founder of People for the Ethical Treatment of Animals (Peta) was flying from Minneapolis in the US to the company HQ in Norfolk, Virginia when her plane encountered strong wind shear. The pilot attempted an emergency landing, but failed; back up they went. On the third attempt, with “a teaspoon of fuel” in the tank, he finally got the plane down safely. During those moments, Newkirk, now 76, scribbled a will on a napkin. She has tweaked it...