Restatement (Second) of Torts § 402A establishes the legal principle of strict liability for defective products. This section holds that a seller is liable for harm caused by a product that is unreasonably dangerous to users, even if the seller exercised all possible care in the preparation and sale of the product. It reflects a shift in liability where the focus is on the product's condition rather than the seller's conduct, aiming to protect consumers from unsafe products.