World Cup places are distributed among the continental confederations before any qualifying match is played. The allocation is decided politically, and it satisfies nobody completely because the criteria conflict.
Membership numbers pull one way
Confederations vary enormously in how many national associations they contain, and a body with many members argues for places proportionate to that membership.
Under this logic, allocation reflects the number of teams competing rather than how those teams perform once they arrive.
Because votes are held by association, confederations with large memberships also carry weight in the decisions that set the allocation, so the argument and the means of winning it point in the same direction.
Recent performance pulls the other way
An alternative argument allocates places according to how teams from each confederation have fared at recent tournaments, rewarding demonstrated strength.
Confederations whose teams routinely reach the later rounds use this to argue that their qualifying competitions are harder than the allocation implies.
The measure is unstable, since tournament results involve small samples and a single strong run can change a confederation's case considerably. A region can therefore argue from a position that its own next tournament will contradict.
Commercial value is an unstated criterion
Large television markets generate a disproportionate share of tournament revenue, and their absence from a finals tournament is commercially costly.
Allocations therefore tend to protect regions that deliver audiences, even where recent competitive results might argue for fewer places.
This is rarely stated in those terms, which is why the published justifications often feel incomplete to the confederations that lose out.
Play-offs handle the residual
Rather than assign every place outright, tournaments hold inter-confederation play-offs in which teams from different regions compete for remaining slots.
The mechanism defers the argument, converting an allocation dispute into a small competition whose outcome nobody can be blamed for.
It also creates fixtures with high commercial value, since a single match between teams from distant regions attracts attention in both. The play-off is consequently defended on grounds that have nothing to do with the dispute it settles.
Expansion changed the arithmetic without settling it
Enlarging the tournament allowed every confederation to receive more places, which is why expansion attracted broad support across the membership.
The relative shares still had to be negotiated, and the same arguments about membership, performance and market value applied to the additional slots.
Allocation is therefore a recurring negotiation rather than a formula, and it is revisited whenever the tournament's size or governance changes.
