What Judicial requirement that laws may not treat individuals unfairly?

The judicial requirement that laws may not treat individuals unfairly is rooted in the principle of equal protection under the law, which is enshrined in many legal systems, including the Fourteenth Amendment of the U.S. Constitution. This principle mandates that all individuals, regardless of race, gender, or socioeconomic status, must be treated equally in legal proceedings and by legislative measures. It aims to prevent discrimination and ensure fairness in the application of laws, thereby upholding justice and individual rights.