Insurance law is the practice of law surrounding insurance, including insurance policies and claims. It can be broadly broken into three categories - regulation of the business of insurance; regulation of the content of insurance policies, especially with regard to consumer policies; and regulation of claim handling.
The earliest form of insurance is probably marine insurance, although forms of mutuality (group self-insurance) existed before that. Marine insurance originated with the merchants of the Hanseatic league and the financiers of Lombardy in the 12th and 13th centuries, recorded in the name of Lombard Street in the City of London, the oldest trading insurance market. In those early days, insurance was intrinsically coupled with the expansion of mercantilism, and exploration (and exploitation) of new sources of gold, silver, spices, furs and other precious goods - including slaves - from the New World. For these merchant adventurers, insurance was the "means whereof it comes to pass that upon the loss or perishing of any ship there followed not the undoing of any man, but the loss lighteth rather easily upon many than upon a few... whereby all merchants, especially those of the younger sort, are allured to venture more willingly and more freely."
Common law jurisdictions in former members of the British empire, including the United States, Canada, India, South Africa, and Australia ultimately originate with the law of England and Wales. What distinguishes common law jurisdictions from their civil law counterparts is the concept of judge-made law and the principle of stare decisis - the idea, at its simplest, that courts are bound by the previous decisions of courts of the same or higher status. In the insurance law context, this meant that the decisions of early commercial judges such as Mansfield, Lord Eldon and Buller bound, or, outside England and Wales, were at the least highly persuasive to, their successors considering similar questions of law.
Most, and until 2005 all, common law jurisdictions require the insured to have an insurable interest in the subject matter of the insurance. An insurable interest is that legal or equitable relationship between the insured and the subject matter of the insurance, separate from the existence of the insurance relationship, by which the insured would be prejudiced by the occurrence of the event insured against, or conversely would take a benefit from its non-occurrence. Insurable interest was long held to be morally necessary in insurance contracts to distinguish them, as enforceable contracts, from unenforceable gambling agreements (binding "in honour" only) and to quell the practice, in the seventeenth and eighteenth centuries, of taking out life policies upon the lives of strangers.
In commercial contracts generally, a warranty is a contractual term, breach of which gives right to damages alone; whereas a condition is a subjectivity of the contract, such that if the condition is not satisfied, the contract will not bind. By contrast, a warranty of a fact or state of affairs in an insurance contract, once breached, discharges the insurer from liability under the contract from the moment of breach; while breach of a mere condition gives rise to a claim in damages alone.


