Calculating Promises. The Emergence of Modern American Contract Doctrine
Roy Kreitner - Stanford University press, 2007
This book is a history of American contract law around the turn of
the twentieth century. It meticulously details shifts in our conception
of contract by juxtaposing scholarly accounts of contract with case
law, and shows how the cases exhibit conflicts for which scholarship
offers just one of many possible answers.

The author maintains that the revolution
in contract thinking is best understood in a frame of reference wider
than the rules governing the formation and enforcement of contracts.
That frame of reference is a cultural negotiation over the nature of the
individual subject and the role of the individual in a society
undergoing transformation. Areas of central concern include the
enforceability of promises to make gifts; the relationship of contracts
to speculation and gambling; and the problem of incomplete contracts.