Definitions

natural event

Proximate cause

For English law, see Causation in English law In the law, a proximate cause is an event sufficiently related to a legally recognizable injury to be held the cause of that injury. There are two types of causation in the law, cause-in-fact and proximate (or legal) cause. Cause-in-fact is determined by the "but-for" test: but for the action, the result would not have happened. For example, but for running the red light, the collision would not have occurred. For an act to cause a harm, both tests must be met; proximate cause is a legal limitation on cause-in-fact.

But for test

A few circumstances exist where the but for test is ineffective. The primary examples are:

  • Concurrent causes. Where two separate acts of negligence combine to cause an injury to a third party, each actor is liable, even though the injury would not have happened but for the negligence of the other actor. For example, a construction worker negligently leaves the cover off a manhole, and a careless driver negligently clips a pedestrian, forcing the pedestrian to fall into the open manhole. Both the construction worker and the careless driver are equally liable for the injury to the pedestrian.
  • Sufficient combined causes. Where an injury results from two separate acts of negligence, either of which would have been sufficient to cause the injury, both actors are liable. For example, two campers in different parts of the woods negligently leave their campfires unattended. A forest fire results, but the same amount of property damage would have resulted from either fire. Both campers are equally liable for all damage. A famous case establishing this principle in the United States is Corey v. Havener.
  • In the United States, the rule of Summers v. Tice holds that where two parties are equally negligent, but only one causes an injury to a third party, the burden shifts to the negligent parties to prove that they were not the cause of the injury. In that case, two hunters negligently fired their shotguns in the direction of their guide, and a pellet lodged in his eye. Because it was impossible to tell which hunter fired the shot that caused the injury, the court held both hunters liable.
  • Market share evidence.

Problems with but for causation

Since but-for causation is very easy to show and does not assign culpability (but for the rain, you would not have crashed your car the rain is not morally or legally culpable but still constitutes a cause), there is a second test used to determine if an action is close enough to a harm in a "chain of events" to be a legally culpable cause of the harm. This test is called proximate cause.

There are several competing theories of proximate cause.

Foreseeability

The most common test of proximate cause is foreseeability. It determines if the harm resulting from an action was reasonably able to be predicted. The test is used in most cases only in respect to the type of harm. It is foreseeable that throwing a baseball at someone could cause them a blunt-force injury. But proximate cause is still met if a thrown baseball misses the target and knocks a heavy object off a shelf behind them, which causes a blunt-force injury.

This is also known as the "extraordinary in hindsight” rule.

Direct Causation

Direct causation is a minority test, which addresses only the metaphysical concept of causation. The main thrust of direct causation is that there are no intervening causes between an act and the resulting harm. An intervening cause has several requirements: it must 1) be independent of the original act, 2) be a voluntary human act or an abnormal natural event, and 3) occur in time between the original act and the harm.

Direct causation is the only theory that addresses only causation, and does not take into account the culpability of the original actor.

Risk enhancement/causal link

The plaintiff must demonstrate that the defendant's action increased the risk that the particular harm suffered by the plaintiff would occur. If the action were repeated, the likelihood of the harm would correspondingly increase. This is also called foreseeable risk.

Harm Within the Risk (HWR)

The Harm Within the Risk test determines if the harm was within the class of risks, and if the victim was within the class of persons forseeably harmed. It is the strictest test of causation, made famous by Benjamin Cardozo in the Palsgraf case.

The first element of the test, if the harm was an instance of the type of harm that made the actor negligent, is met if the person could be expected to be hurt by the act.

A good illustration of this is that a pedestrian is within the class of people risked by driving on the sidewalk, whereas another driver who is distracted by someone driving on the sidewalk and thus crashes into a telephone pole is not.

The second prong of the test is if the type of harm was in the class of expected harms. Giving a loaded gun to a small child gives rise to the expectation that someone will be shot. If the child drops the gun and it breaks someone's foot, the HWR test will fail, as a broken foot was not the type of harm anticipated.

The HWR test is not used much anymore, and when it is used, just looks at the class of people hurt, not at the type of harm. The main issue with this test is that it addresses culpability, not actual causation.

Controversy

The doctrine of proximate cause is notoriously confusing. The doctrine is phrased in the language of causation, but in most of the cases in which causation is contested, there is not much real dispute that the defendant but-for caused the plaintiff's injury. The doctrine is actually used by judges to limit the scope of the defendant's liability to a subset of the total class of potential plaintiffs who suffered some harm from the defendant's actions. For an understanding of the broader view of causation which proximate cause circumscribes, see Butterfly effect.

For example, in the two famous Kinsman Transit cases from the 2nd Circuit (exercising admiralty jurisdiction over a New York incident), it was clear that mooring a boat improperly could lead to the risk of a boat drifting away and crashing into another boat, and that both boats could crash into a bridge, which collapsed and blocked the river, and in turn, the wreckage could flood the land adjacent to the river, as well as prevent any traffic from traversing the river until it had been cleared. But under proximate cause, the property owners adjacent to the river could sue (Kinsman I), but not the owners of the boats or the cargoes which could not move until the river was reopened (Kinsman II).

Therefore, in 2001, the American Law Institute proposed in a draft of the Restatement (Third), Torts: Liability for Physical Harm (Basic Principles) that proximate cause should be replaced with scope of liability.

Use of the term by historians

The term "proximate cause" is also used by historians, in the sense of a specific event or incident setting off a war, revolution etc. which had deeper roots and causes. An often cited example is the assassination of Archduke Franz Ferdinand of Austria at Sarajevo, the event which directly set off the First World War - but it is generally assumed by historians that the war was actually caused by the sharpening rivalries between the European powers and the setting up of rival military alliances, and that had the assassination not taken place, some other incident would have still set off the war. The distinction between an immediate proximate cause and the deeper and more fundamental causes has become a staple of historical research.

See also

References

  • Michael S. Moore, The Metaphysics of Causal Intervention, California Law Review, May, 2000. 88 Calif. L. Rev. 827.
  • Leon A. Green, The Rationale of Proximate Cause (1927).

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