Proximate cause

What is proximate cause?

Proximate cause asks whether the connection between a defendant's conduct and the resulting injury is close enough that responsibility should genuinely attach, distinguishing it from actual cause, which simply asks whether the injury would have happened without the conduct.

A defendant's carelessness can be an actual cause of harm in a purely factual sense while still being considered too legally remote to support liability, if the chain of events leading to the specific injury became sufficiently attenuated or unusual.

The doctrine reflects a policy judgment that responsibility should not extend infinitely down every conceivable chain of consequences, however factually connected they might technically be.

It is closely intertwined with the concept of foreseeability, since courts generally ask whether the specific type of harm was a reasonably foreseeable consequence of the original conduct.

What factors do courts consider in this analysis?

Several considerations generally inform whether a specific consequence is close enough to support liability.

• Whether the general type of harm was reasonably foreseeable
• The number of intervening events or actions between the conduct and the injury
• Whether any intervening cause was itself independently foreseeable
• The overall directness of the connection between conduct and harm
• Broader considerations of fairness in extending liability that far

What is a superseding cause?

A superseding cause is an intervening event significant and unforeseeable enough to break the chain of proximate causation entirely, relieving the original defendant of liability for what followed.

For an intervening event to genuinely qualify, it generally must be both unforeseeable and sufficiently significant in its own right, rather than merely being a contributing factor alongside the original negligence.

Courts apply this doctrine relatively narrowly, since most intervening events, even unexpected ones, do not actually rise to the level required to fully break the causal chain.

How does this doctrine actually operate in practice?

An initial negligent act typically remains the proximate cause of resulting harm even where other factors also contributed, so long as the general type of harm remained reasonably foreseeable throughout.

Where a genuinely unforeseeable, independent event intervenes and becomes the actual, superseding cause of the ultimate harm, the original defendant's proximate causation link may be broken.

This analysis is highly fact specific, and how it applies to any particular chain of events generally requires careful case specific legal analysis.

Common questions

Is proximate cause the same thing as actual cause?

No. Actual cause asks whether the injury would have occurred without the specific conduct. Proximate cause separately asks whether the connection is close enough to fairly support legal responsibility.

Can an unusual chain of events defeat my claim?

Potentially, if a court finds the resulting harm was not reasonably foreseeable or that a superseding cause genuinely intervened and broke the causal chain.

Who decides proximate cause in a case?

This is generally a factual question for the jury to resolve, guided by legal instructions from the judge regarding the applicable proximate cause standard.