Descartes and Modern Philosophy
Descartes and the Rise of Modern Philosophy
The 17th Century: A Time of Change
The 17th century witnessed the decline of the Spanish Empire and the rise of England and France. This period saw the consolidation of absolute monarchy alongside the emergence of a new English policy based on liberalism and promoted by the bourgeoisie, culminating in the English Revolution. The Baroque era played a crucial role in shaping modern thought.
The Dawn of Modern Philosophy
Following the decline of Scholastic philosophy, a new era emerged: modern philosophy. This era was marked by rationalism, a movement championing reason as the primary source of knowledge, with Descartes as a key figure. Simultaneously, empiricism, spearheaded by Locke and Hume in the British Isles, gained prominence.
Two Converging Cultural Forces
Two cultural forces converged in the development of modernity: Renaissance Humanism and the rise of science. Humanism emphasized an anthropocentric and naturalistic perspective, while science became the driving force behind the arrival of modernity.
Key Features of Renaissance Science
- Autonomy of nature from God and religion.
- Mechanism as the model for representing nature (like a clock).
- Importance of experimentation.
- Quantitative conception of nature, leading to the classification of qualities as primary/secondary or objective/subjective.
- Nature as simple and governed by laws discoverable through reason.
The Scientific Method
Despite its basis in reason, science relies on sensory experience. This link became the essence of the new scientific method, proposed by Galileo, known as the deductive method. Its steps include:
- Resolution/Analysis: Identifying essential properties through sensory experience.
- Composition: Constructing a hypothesis and deriving consequences.
- Experimental Resolution: Testing the deduced consequences.
Descartes’ Philosophy
Descartes’ philosophy was marked by skepticism. Only mathematics, with its clarity and evidence, convinced him, though he recognized that its philosophical principles could also be doubted. He resolved to trust his own reason and question previous philosophers.
The Pursuit of Clear and Distinct Ideas
Descartes sought clear and distinct ideas to build a certain and well-ordered philosophy. He aimed to find truth rationally and systematically, regardless of prior authorities.
The Unitary Nature of Reason and Knowledge
Descartes believed in the unitary nature of reason and knowledge. Wisdom stems from the singularity of reason. Different sciences arise from reason’s application to various objects.
Two Basic Mental Operations
Descartes identified two fundamental mental operations: intuition (instinctive grasp of self-evident simple concepts) and deduction (discovering connections between simple concepts).
The Cartesian Method
The Cartesian method consists of four rules for applying intuition and deduction:
- The criterion of truth: clear and distinct evidence.
- Analysis: dividing complex concepts into simpler ones.
- Synthesis: deductive reasoning as a succession of evidence.
- Verification: checking analysis and synthesis.
Cartesian Doubt and the Cogito
Descartes aimed to build knowledge on an absolutely certain truth. His methodical and universal doubt encompassed sensory and mathematical knowledge. The cogito emerged as the first certainty: “I think, therefore I am.” He recognized his existence as a thinking being with ideas.
The Nature of Ideas
Descartes viewed an object as any notion of thought with subjective and objective reality. He classified ideas into three types: innate (clear and distinct), adventitious (unclear, derived from senses), and factitious (constructed by the mind).
The Existence of God
Descartes argued that the idea of God is innate and then sought to prove God’s existence. He posited that the cause of an idea must be as perfect as the idea itself. He presented two proofs: the infinity of God’s being and the truth of God. Descartes defined God as “that which needs nothing but itself to exist,” distinguishing between infinite and finite substances. These substances are known through their attributes.
Anthropological Dualism
Descartes’ anthropological dualism, while his own philosophical creation, shares similarities with Platonic anthropology.