Drawing on a letter from Charles Darwin found in the Oxford Book of Australian Letters, Glover notes the naturalist described killing a platypus as "a great feat" and "a delightful experience." This, Glover writes, shows that even Darwin—famous for upending humanity's certainties—was still "imprisoned by the conventional attitudes of his time."
Glover extends the point to domestic advice once given to women, who were expected to maintain a nice home for their "exhausted" husbands. "In every period, most people cling to common attitudes of the age – no matter how ridiculous," he writes. The implication is that many of today's firmly held beliefs, especially around parenting and gender roles, will one day be looked back on with similar bemusement.