Antitrust breakup is dissolution imposed from outside. The state determines that a corporation has become too large — that it exercises monopoly power, that it stifles competition, that it harms consumers — and orders its division into smaller, independent companies.
The most famous example is the breakup of Standard Oil in 1911. John D. Rockefeller's company controlled approximately 90% of American oil refining. The Supreme Court ordered it dissolved into 34 separate companies. The result, paradoxically, was that Rockefeller became even richer: the combined value of the successor companies — including Exxon, Mobil, and Chevron — far exceeded the value of the original trust.
AT&T was broken up in 1984, splitting the telephone monopoly into seven regional "Baby Bells" and a long-distance company. By 2020, through a series of mergers and acquisitions, the industry had largely reconstituted itself. Dissolution, it turned out, was temporary. The pieces found their way back together.
Antitrust breakup is a peculiar form of dissolution: it is intended to increase competition, but the evidence that it does so is mixed. The pieces often outperform the whole. The dissolution creates value. But it also creates the conditions for its own reversal.
In Fiction
The breakup of Ma Bell (AT&T, 1984) inspired a subgenre of corporate dissolution narratives. Don DeLillo's White Noise (1985) features the "Most Photographed Barn in America" — a thing that exists only to be seen, a corporation that has dissolved into its own image. The breakup of a monopoly, DeLillo suggests, is also the breakup of a way of seeing.