The Fabric of Reality by David Deutsch:
The disappointment experienced by Russell's chicken has also been experienced by trillions of other chickens.
Is trillions accurate? How many chickens have we farmed? How do you even estimate this? My initial intuition is that it's too many.
People have estimated about 100 billion human beings have ever lived. So 3 trillion chickens would be 30 per person. Rich modern people eat more than 30 chickens in a lifetime, but most people have been much poorer. A lot of people have been farmers, but I don't know how many of them raised many chickens.