This paper differentiates political science from political philosophy, following Giovanni Sartori’s perspective in defining political theory as a separate disciplinary field. Not only is political theory a common referential field of study for political science and political philosophy, but it is a domain of methodological and epistemological research as theoretical philosophy. Theoretical philosophy is a discipline that contributes the use of critical hermeneutics derived from Paul Ricoeur’s speculative work. Essentially, it is a general sable, procedural approach for both the historical-social and political-economical sciences. If the validity of this approach depends on its method, its necessity depends on its contemporary cultural and s...