⚖️

Contract Law Theories Overview

Jul 14, 2025

Overview

This lecture covers two contract law theories—promise theory and consent theory—exploring their core principles, critiques, and how they explain the formation and enforcement of contracts.

Promise Theory

  • Promise theory centers on the principle that individuals are morally obligated to keep their promises.
  • Contracts arise from voluntary promises between parties, not from state imposition.
  • The theory draws from will theory and emphasizes the freedom to contract.
  • Contract terms should be interpreted based on what was explicitly promised, minimizing court-imposed terms.
  • Morality underpins the theory, with obligations binding because individuals "ought" to honor commitments.
  • Freed describes a moral spectrum: respect → trust → communication → promises, amplifying moral obligation at each step.
  • Critics argue the theory enforces virtue, questioning why the law only enforces promises with consideration.
  • Another criticism is its limited explanatory power when parties’ intentions or promises are unclear, requiring courts to fill gaps.

Consent Theory

  • Consent theory views contract law as a system for transferring rights based on the owner's consent.
  • It originated in the 1980s, with Randy Barnett as a leading proponent.
  • The theory emphasizes that rights ownership is fundamental—one must have rights to transfer them through contracts.
  • Consent must be objectively manifested, not just subjectively felt, to be legally valid.
  • The validity of a contractual obligation depends on clear, outward evidence of consent.
  • It addresses the issue of implied terms by arguing that parties indirectly consent to default rules.
  • Critics highlight issues when genuine consent to all terms is unclear, especially with unread standard terms or unexpected conditions.

Key Terms & Definitions

  • Promise Theory — The view that contractual obligations arise from voluntary, morally binding promises between parties.
  • Consent Theory — The perspective that contracts are valid based on the owner’s objective manifestation of consent to transfer rights.
  • Consideration — Something of value exchanged between parties, required for contract law to enforce promises.
  • Implied Terms — Contract provisions imposed by courts to fill gaps when the parties' agreement is incomplete.

Action Items / Next Steps

  • Prepare for discussion/debate on the strengths and weaknesses of both promise and consent theories.
  • Review assigned readings on contract law theories for the next class.