Was the pain worth it? Between March 2020 and March 2021, the UK had three national lockdowns. The goal was to control the spread of Covid-19. Essential businesses were closed, as were schools and universities, and “stay at home” orders meant families and friends were often kept apart. At the time, the government was unenthusiastic about lockdown and many Tories opposed it. Lord Sumption, for example, insisted that if it weren’t for lockdown, people could have “a perfectly normal life.” Now a new chorus of lockdown sceptics includes people who position themselves on the left, such as the historian Toby...