Insurance can have various effects on society through the way that it changes who bears the cost of losses and damage. On one hand it can increase fraud, on the other it can help societies and individuals prepare for catastrophes and mitigate the effects of catastrophes on both households and societies.
Insurance can influence the probability of losses through moral hazard, insurance fraud, and preventive steps by the insurance company. Insurance scholars have typically used morale hazard to refer to the increased loss due to unintentional carelessness and moral hazard to refer to increased risk due to intentional carelessness or indifference. Insurers attempt to address carelessness through inspections, policy provisions requiring certain types of maintenance, and possible discounts for loss mitigation efforts. While in theory insurers could encourage investment in loss reduction, some commentators have argued that in practice insurers had historically not aggressively pursued loss control measures – particularly to prevent disaster losses such as hurricanes – because of concerns over rate reductions and legal battles. However, since about 1996 insurers began to take a more active role in loss mitigation, such as through building codes.
In some sense we can say that insurance appears simultaneously with the appearance of human society. We know of two types of economies in human societies: natural or non-monetary economies (using barter and trade with no centralized nor standardized set of financial instruments) and more modern monetary economies (with markets, currency, financial instruments and so on). The former is more primitive and the insurance in such economies entails agreements of mutual aid. If one family’s house is destroyed the neighbours are committed to help rebuild. Granaries housed another primitive form of insurance to indemnify against famines. Often informal or formally intrinsic to local religious customs, this type of insurance has survived to the present day in some countries where modern money economy with its financial instruments is not widespread.
Any risk that can be quantified can potentially be insured. Specific kinds of risk that may give rise to claims are known as perils. An insurance policy will set out in detail which perils are covered by the policy and which are not. Below are non-exhaustive lists of the many different types of insurance that exist. A single policy may cover risks in one or more of the categories set out below. For example, vehicle insurance would typically cover both the property risk (theft or damage to the vehicle) and the liability risk (legal claims arising from an accident). A home insurance policy in the U.S. typically includes coverage for damage to the home and the owner’s belongings, certain legal claims against the owner, and even a small amount of coverage for medical expenses of guests who are injured on the owner’s property.
Business insurance can take a number of different forms, such as the various kinds of professional liability insurance, also called professional indemnity (PI), which are discussed below under that name; and the business owner’s policy (BOP), which packages into one policy many of the kinds of coverage that a business owner needs, in a way analogous to how homeowners’ insurance packages the coverages that a homeowner needs.