Causation asks whether a defendant’s conduct legally caused the harm the plaintiff claims. In plain language, it is the connection question: did this person’s act or omission actually and legally lead to this injury?
Why It Matters
Causation matters because wrongdoing alone is not enough for liability. A plaintiff usually must connect the challenged conduct to the claimed harm. If the connection is too weak, too remote, or interrupted by another cause, the claim may fail even if the defendant behaved badly.
The concept is especially important in negligence cases, but it also matters in other tort theories. It helps courts decide whether the law should assign responsibility for a particular injury to a particular defendant.
Where It Appears
Causation appears in negligence pleadings, summary judgment motions, expert testimony, jury instructions, and appellate opinions. It often becomes a central issue when multiple events, actors, or preexisting conditions contributed to the harm.
Practical Example
A company ignores a known machine-safety defect. An employee later suffers a hand injury while using that machine. Causation asks whether the defect and the company’s failure to address it legally caused the injury.
How It Differs From Nearby Terms
- Duty of care asks whether the defendant owed a legal obligation of reasonable care.
- Negligence is the broader claim that includes breach, causation, and damages analysis.
- Cause of action is the legal claim structure; causation is one part of proving that claim.
- Strict liability may relax the focus on carelessness, but the plaintiff still has to connect the defendant or product to the harm.
Related Terms
Knowledge Check
- Is causation just about showing that a defendant acted badly? No. It is about connecting the defendant’s conduct to the plaintiff’s specific harm.
- Why is causation often disputed in complex injury cases? Because multiple events or actors may have contributed to the outcome, making the legal connection harder to prove.