Sociological Jurisprudence shifts focus from abstract legal theories to the functional impact of law on society, while Legal Realism examines how judges actually decide cases in practice.
1. Sociological School: Key Theories
- Rudolph von Ihering: Defined law as the pursuit of social purposes, serving as a tool to balance individual and social claims.
- Eugen Ehrlich (Living Law): Argued that the true rules of law are found in the "living law" of community customs, not in dusty statute books.
- Roscoe Pound (Social Engineering Theory):
- Pound defined law as a tool of social engineering designed to construct an efficient social structure with minimal friction and waste.
- He classified interests into Private Interests (individual claims), Public Interests (state claims), and Social Interests (general security, conservation). The role of the jurist is to balance these interests dynamically.
2. American Legal Realism
Legal Realism is a radical offshoot of the sociological school that prioritizes "law in action" over "law in books." Realists view law as the product of judicial decisions:
- Oliver Wendell Holmes: Declared: "The life of the law has not been logic; it has been experience." He defined law as "the prophecies of what the courts will do in fact" (the Bad Man Theory).
- Jerome Frank (Fact Skepticism): Frank argued that judicial decisions are not derived from objective rules. Instead, they are decided based on personal, psychological, or emotional factors of the judge, who then rationalizes the decision using legal rules.