This lecture on torts law explains the fundamental principles of negligence, outlining its four core elements: duty, breach, causation, and damages, alongside related doctrines such as res ipsa loquitur and negligence per se. The text details various standards of care and methods for establishing breach, including the Hand formula. It further analyzes causation and the requirement of actual harm for negligence claims. Finally, the lecture transitions to strict liability, discussing its application to abnormally dangerous activities, animals, and defective products, and briefly mentions defenses applicable to both negligence and strict liability.