
Contracts are a vital part of modern life, underpinning economic activity and social relationships. The law of contracts, in its orthodox expression, concerns voluntary or chosen legal obligations. The freedom to contract is a cornerstone of free-market libertarianism, with individuals possessing the freedom to choose with whom to contract, whether to contract, and on which terms to contract. This freedom is not absolute, however, and there are laws in place to guarantee voluntary contracts. These include requirements for informed and voluntary choice, with fraud, duress, and various forms of pressure representing grounds for rescission. In the United States, the right to make and enforce contracts is embedded in Title 42 of the US Code, and courts play a crucial role in interpreting and enforcing these rights. Implied contracts, which are assumed to exist without written or verbal confirmation, also carry legal weight. To ensure voluntary agreement, parties are advised to consult with attorneys and are given ample time to review contracts before signing, acknowledging that they enter into them voluntarily. Despite these safeguards, historical cases, such as Lochner v. New York, demonstrate the complex interplay between freedom of contract, state regulation, and judicial interpretation.
| Characteristics | Values |
|---|---|
| Contract law | Emphasizes the duty to vindicate the promisee's expectations |
| Individuals possess the capacities necessary for informed and voluntary choice | |
| Fraud, duress, and pressure in bargaining represent grounds for rescission | |
| Contracts are formed by the actions, behavior, or circumstances of the parties involved | |
| Implied contracts are legally enforceable and can be held up in court | |
| Individuals have the freedom to choose with whom to contract, whether to contract, and on which terms to contract | |
| Contracts must be entered into without duress or coercion | |
| Contracts must not require a party to break the law | |
| All parties must have the legal capacity to contract |
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What You'll Learn

Freedom of contract
The concept of freedom of contract can be traced back to the period after 1770, which English law professor Patrick Atiyah calls "the age of Freedom of Contract". During this time, the idea that contracts could be based on consent gained prominence in legal circles. Atiyah argues that the decline of this concept began in 1870, and by the late 19th century, the English judiciary was espousing "freedom of contract" as a general feature of public policy.
In the United States, the right to make and enforce contracts is enshrined in Title 42 of the US Code. This includes the freedom to form, perform, modify, and terminate contracts, as well as to enjoy the benefits, privileges, terms, and conditions of the contractual relationship. For example, in 1905, the Supreme Court ruled that a New York state statute limiting the number of hours employees could work violated the United States Constitution's due process clause, thus upholding an individual's right to freely contract.
However, it is important to note that freedom of contract has its limitations. For instance, contracts that involve illegal activities, such as the sale of prohibited substances, are invalid. Contracts formed under duress, coercion, or intimidation are also not considered voluntary and are therefore invalid and unenforceable. Additionally, certain individuals, such as minors, may not have the legal capacity to enter into contracts, except for contracts of necessity like food and lodging.
To ensure voluntary agreement, it is common for contracts to include clauses stating that each party has had the opportunity to consult with an attorney and fully understands the terms of the agreement. These clauses help protect individuals from entering into agreements without fully understanding their rights and obligations.
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Implied contracts
An implied contract is a legally binding obligation that is inferred from the actions, conduct, or circumstances of the parties involved in an agreement. Unlike express contracts, implied contracts do not require written or verbal agreements to come into existence. Instead, they are based on the behaviour of the parties involved or a set of circumstances.
There are two types of implied contracts: implied-in-fact contracts and implied-in-law contracts. Implied-in-fact contracts are created by the circumstances and behaviour of the parties involved. For example, if a customer enters a restaurant and orders food, an implied contract is created. The restaurant owner is obligated to serve the food, and the customer is obligated to pay the listed price. Implied-in-fact contracts may also be based on past conduct. For instance, a teenager offers to walk a neighbour's dog and is rewarded with movie tickets. This creates an implied contract, as it is reasonable to assume that the neighbour will continue to provide movie tickets in return for dog-walking services.
Implied-in-law contracts, also known as quasi-contracts, are legally binding contracts that neither party intended to create. These contracts are based primarily on circumstances rather than the behaviour of the parties involved. They are designed to prevent unjust enrichment, where one party benefits at the expense of another. For example, if a doctor provides emergency medical treatment to someone who is unconscious, an implied-in-law contract exists, and the doctor is entitled to compensation for their services.
In summary, implied contracts are legally binding obligations that are inferred from the actions or circumstances of the parties involved. They can be categorised as implied-in-fact or implied-in-law contracts and hold the same legal weight as express contracts. While implied contracts may be more difficult to enforce, they play a significant role in ensuring fairness and preventing unjust enrichment.
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Voluntarism
The law of contracts, therefore, empowers individuals to shape their own rights and responsibilities through voluntary legal obligations. Contracts are typically formed when there is an offer, acceptance of the offer, mutual agreement, and consideration. In some cases, contracts may also be implied rather than explicitly stated, through the behaviour and actions of the parties involved.
For a contract to be considered valid and enforceable, it must meet certain conditions. All parties must possess the legal capacity to contract, which excludes minors under the age of 18 in most jurisdictions. Additionally, the contract must not involve illegal activities, and it must be free from duress, coercion, or intimidation. Parties must voluntarily consent without any form of pressure or force.
In the United States, the right to make and enforce contracts is enshrined in Title 42 of the US Code. This includes the freedom to form, perform, modify, and terminate contractual relationships. However, the concept of "freedom of contract" has been criticised for prioritising economic ideology over labour rights and has faced legal challenges over time.
To summarise, voluntarism in contract law emphasises individual freedom and choice in forming contractual agreements. While this principle has been central to economic theories and legal systems, it is also subject to limitations and criticisms aimed at protecting individuals and promoting social welfare.
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Procedural unconscionability
Another factor that can contribute to procedural unconscionability is consumer ignorance or a large amount of unexplained fine print. When a party does not fully understand the terms of the contract or is overwhelmed by complex legal language, they may be deprived of the ability to make an informed and voluntary choice. In such cases, courts may refuse to enforce the contract on the basis that it is unfair or oppressive.
To prevent procedural unconscionability, it is important for individuals to carefully review contracts, seek legal advice if necessary, and ensure they fully understand the terms before agreeing to them. This can help ensure that all parties are entering into the contract voluntarily and with full knowledge of its implications.
In the context of voluntary contracts, it is essential to consider the concept of consent. Contracts are typically enforced on the assumption that parties are consenting to the terms voluntarily and without coercion. This principle of voluntary agreement is a fundamental aspect of contract law, emphasising the importance of freedom and autonomy in contractual exchange.
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Contract invalidity
A contract is a voluntary, legal agreement between two or more parties. It is important to understand the concept of contract invalidity, as it can render a contract void or voidable. An invalid contract is unenforceable, and if a contract is deemed invalid, all prior performance must be compensated for.
There are several reasons why a contract may be invalid. Firstly, if a contract pertains to illegal activities, it is not valid. All terms of a contract must be in line with federal and state law. If any party is compelled to enter a contract against their will, through duress or coercion, the contract is invalid. Duress can be in the form of force or the threat of force, or it can be economical. For example, if a person's house is threatened to be burnt down if they do not sign a contract.
Secondly, if a contract is impossible to complete, or if the terms are too vague or incomprehensible, it can be deemed invalid. Thirdly, if a contract is found to be signed under misrepresentation, it can be invalidated. This includes substantive unconscionability, where the terms are harsh, unfair, oppressive, and one-sided.
Finally, persons with mental deficiencies cannot enter into a contract, except for contracts concerning basic necessities. If a contract is made with a person with a mental deficiency, they or their guardian can void the contract. However, if a person voluntarily gets intoxicated, they are generally considered to have the capacity to enter a contract, unless the intoxication made them unable to understand the nature of their actions, and this was taken advantage of by the other party.
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Frequently asked questions
A voluntary contract is a legal obligation that is chosen by the parties involved. It can be formed by an implied agreement or an express agreement. An implied contract is created by the actions, behaviour, or circumstances of the people involved, whereas an express contract is agreed upon verbally or in writing.
In the United States, the right to make and enforce contracts is embedded in Title 42 of the US Code. This includes the making, performance, modification, and termination of contracts, as well as the benefits, privileges, terms, and conditions of the contractual relationship.
A voluntary contract may be invalid if it requires a party to break the law, if it is formed under duress or coercion, or if it involves procedural unconscionability, such as unfair surprise or a minor's inability to consent.


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