Infant sleep has become a moral test administered in public. Whether a baby is sleeping through the night by some culturally specified age, whether the parents got there by allowing the baby to cry, by maintaining contact through the night, by some hybrid method, or by accepting that sleep will simply be broken for a long time — each of these answers locates the parents on a moral map drawn by competing experts and reinforced by every social interaction in the first year. Sleep training discourse — cry-it-out versus attachment, Ferber versus Sears, controlled comforting versus cosleeping — is the public stage on which the culture works out a deeper question: what do we believe babies are, and what do we believe parents owe them. The answers vary enormously across cultures and across history. The certainty with which any one camp asserts its position in the contemporary West is historically anomalous and culturally provincial.
The collective dimension is that the discourse organizes a vast amount of new-parent suffering. New parents are exhausted; sleep is their most acute material need; the choices around how to get more of it are presented as life-shaping decisions that will determine the child's attachment security, future mental health, and the parents' moral standing in their social circle. The advice is contradictory. The research is partial. The cultural frame in which the research is read is parochial. The result is a parental population in which many feel they have done something wrong regardless of which path they took, and in which the energy that could be spent surviving the year is spent litigating the methodology.
The humility move at the cultural level is to recognize that infant sleep is enormously variable, that babies have been raised across human history under conditions that bear no resemblance to a solitary crib in a separate room, that the contemporary norms are recent and unstable, and that no method is universally right or universally harmful. The grace move is to extend non-judgment to other parents regardless of what they have chosen. The forgiveness move is to release oneself from the verdicts pronounced by experts whose certainty exceeds their evidence. Beneath all of this is the more basic recognition that a tired parent doing her best in the conditions she actually has is doing the work, regardless of which book she is or is not following. A culture that practiced these recognitions would have less midnight shame, more honest support, and a better chance of building the structural supports — paid leave, postpartum care, family help — that determine sleep outcomes more than any method.