The behavioral revolution shifted political science toward empirical observation and scientific methodology. Systems theory, popularized by thinkers like David Easton, emerged from this movement by conceptualizing the political process as a system of inputs, outputs, and feedback loops. This approach allowed scholars to analyze political phenomena with greater precision and structural rigor, moving away from purely normative or historical descriptions.

Morton Kaplan, in his work 'System and Process in International Politics', developed models of international systems. He famously analyzed the 'loose bipolar' and 'tight bipolar' systems. His theoretical framework suggests that international stability is often maintained through the interaction of two dominant poles, which exert influence over their respective blocs, thereby shaping the global power structure.

David Easton is a central figure in the behavioral revolution of political science. He advocated for a systems approach that integrates insights from sociology, psychology, and anthropology to understand political phenomena. By treating the political system as an open system influenced by its environment, Easton moved the discipline toward a more rigorous, interdisciplinary, and scientific methodology.

Charles McClelland, a pioneer in systems theory within international relations, borrowed the concept of a 'system' from biology. In biological systems, various organs and processes function interdependently to maintain the life of the organism. McClelland applied this analogy to international politics, viewing states as interconnected parts of a larger, functioning global system where the actions of one part affect the whole.

Source answer preserved: option B (system theory). AI attempted to change protected answer data (correct_option), so this item is flagged for manual review before study use.

Karl Deutsch introduced the cybernetic model to political science in his seminal work, 'The Nerves of Government' (1963). He viewed the political system as a communication network where information flow, feedback loops, and decision-making processes are central to understanding how states function and maintain stability in a complex environment.

The source identifies statements 2 and 3 as incorrect. Statement 1 describes general systems theory, which is accurate. Statements 2 and 3 are marked as incorrect because systems theory is not exclusively Marxist, and Raul Prebisch is primarily associated with dependency theory rather than general systems theory. This classification follows the provided answer key.

The Behavioural Revolution in the mid-20th century shifted political science toward empirical, scientific, and holistic analysis. By moving away from purely descriptive or legalistic studies, scholars began to view political systems as complex, interconnected entities. This shift provided the necessary framework for general systems theory, which seeks to understand how various political structures and processes interact to maintain the stability of the whole system.

Systems theory in political science gained prominence during the behavioral revolution as scholars sought more rigorous, scientific methods to analyze political phenomena. Statement 1 is correct as it reflects this historical context. Statement 3 is correct because the theory aims to provide a unified framework for scientific analysis. Statement 2 is incorrect because there is no single, universally accepted definition of a 'system' in political science, as various scholars interpret it differently.

Karl Deutsch is renowned for applying cybernetic models to political science. In his seminal work, 'The Nerves of Government,' he utilized concepts from communication theory and cybernetics, specifically focusing on how political systems process information, utilize feedback mechanisms, and adapt through learning to achieve their goals.