This is an important book. As Kislev points out, most people, when asked to name groups that are subject to discrimination and prejudice do not automatically name singles. Yet the negative stereotyping, overt and subtle social exclusion, and discrimination in the workplace and elsewhere, faced by single people is constant and often goes unchallenged.
Kislev cites interviews and statistical data to show that the growing trend towards long periods of singleness is both inevitable and potentially a positive development. He also discusses the characteristics and strategies that enable many people to experience their singleness - whether or not they consciously chose it - as a joyous, healthy and productive way of life.
Two discussions are missing here for me. The first is the genuine desire that many people feel, to find a long-term - ideally life-long - partner. I felt that this urge was treated in the book as a construct made up entirely of social pressure (sometimes cynically reinforced by governments) + pragmatic calculations of future happiness, often misplaced. We emerge with a sense that if people were fully aware that their needs for sex, companionship and practical support in old age could easily and more reliably be met without marriage, most peoples' desire for long-term partnership would disappear. Can this be demonstrated?
It wouldn't trouble me; the message of the book is clearly that everyone must choose what is right for them. But I'm not sure whether encouraging the ethos of seeking happiness in the easiest way doesn't come at the expense of those who are willing to make significant sacrifices for their honest desire for partnership. This uneasiness was reinforced by an interesting, if dystopian (?), discussion at the end of the book about future developments in artificial intelligence. The suggestion that many singles will rejoice in the future to be partnered with a robot who can fulfill all their needs while demanding nothing in return does nothing to combat the stereotype of the selfish bachelor who enjoys female company but can't be bothered to commit.
The other missing discussion was that of children. I think it is right that the focus here is not on parenthood; many discussions of singlehood perhaps over-focus on the potential impact of divorce or single parenthood on children. But while children are certainly mentioned here and there, I think a discussion of the options available to single men and women who want to have children, the ways in which they make that viable and how successful they are in their aims, would have been in place here.
However, this is a new field, and this is a groundbreaking book. Important for anyone who is or is likely to become single; which, as Kislev reminds us, includes at least one spouse in every marriage as well as the growing ranks of the single-by-choice.