Summer camp is one of the strangest inventions in American childhood. For roughly ten weeks each year, a parallel society opens in the woods and by the lakes, governed by bugles and color wars and counselors barely older than the campers. Then it closes, and most of the country returns to a school calendar designed for a 19th-century agricultural rhythm nobody actually farms anymore. What happens in those weeks — and who gets to attend — is not a small thing. Camp is where a particular kind of American child learns to belong to a peer group that is not the family, to a tradition that is not the church, and to a landscape that is not the neighborhood. It is connective infrastructure (Law 3) at industrial scale, and it has been stratified by class since the day it was invented.

The first organized camps in the 1880s and 1890s were anxious reactions to urbanization. Boys in particular, the reformers said, were going soft. Cities were enervating, sedentary, feminizing. Camp would put the muscle and the silence back. The customers were the children of the professional middle and upper classes — the same families whose fathers were inventing the suburb and the country club. Working-class children, when they got fresh air at all, got it through Fresh Air Fund excursions and settlement-house outings: shorter, cheaper, more chaperoned, more explicitly therapeutic. The split was there at the founding, and it never closed.

A century later, the geography of camp tracks the geography of inheritance with depressing precision. A summer at a traditional sleepaway camp in Maine or New Hampshire now costs more than a year of in-state tuition at many public universities. Day camp, the middle tier, runs from genuinely affordable through aspirational. At the bottom, parks-and-rec programs and Y camps do the work of keeping kids from drowning in summer learning loss, with budgets that get cut every recession and never quite restored. The labor problem is downstream of the same divide: a summer becomes a logistical emergency for any family without one parent home or a grandmother nearby, and the emergency is solved differently at different income levels. The rich buy enrichment, the middle buys childcare with enrichment branding, and the poor patch together cousins, neighbors, and television.

The reason this matters under Law 3 is that camp is a connection-manufacturing machine, and we have built a society in which the machine runs hardest for the children who least need it. A child who already has a stable family, a strong school, and a thick neighborhood goes to a camp that gives her another tribe — alumni she will see at college, friends she will see at weddings, a network that mortars itself into her adulthood. A child who has none of those things gets, if she's lucky, two weeks of structured play, and then nothing. The connective dividend compounds at the top and starves at the bottom, and we call the result a meritocracy.

There are partial counter-traditions worth naming. Jewish camps in the 20th century deliberately served first- and second-generation immigrant kids and built a continental network of belonging that helped a stigmatized minority become an integrated American community. Black camps, often church-run, did parallel work under harder conditions. Union camps — yes, those existed — taught labor history alongside swimming. 4-H and Scout camps, discussed in their own entries, tried to do at scale what the elite camps did at price. Some still try. But the dominant model now is private, expensive, and quietly hereditary: legacy admissions, sibling discounts, parent-alumni mailing lists. A camp is a small institution; an institution that selects for the children of its former campers becomes, in three generations, a class marker.

The Law 4 question — what do you do about it — has a few honest answers. Subsidize. The cheapest public good a city can buy is a summer of supervised outdoor play for its children, and most American cities have stopped buying it at anywhere near the necessary scale. Open the lakes. A surprising amount of summer-camp magic is just access to a body of water and an adult who knows CPR; municipalities that have lost their public swimming infrastructure have lost more than they realize. Defend the legacy youth orgs. Scouts and 4-H are wounded and shrinking, but they still operate camp networks at a price point nothing else matches. And finally, name the thing. The summer-camp class divide is not a quirk of the leisure economy. It is one of the main mechanisms by which connective advantage is transmitted from one generation to the next, and pretending otherwise is how it keeps working.