What is Realism?

Realism is a broad philosophical and artistic doctrine that holds that reality exists independently of human perception, beliefs, or consciousness. In philosophy, realism asserts that objects, events, and entities exist in the world regardless of whether they are being observed or thought about. Realism opposes idealism, which claims that reality is primarily shaped by the mind or ideas, and it contrasts with various forms of anti-realism, which question the independence of reality from human knowledge or linguistic constructs.

Realism has applications across multiple domains of philosophy, including metaphysics, epistemology, ethics, and aesthetics, as well as in the natural sciences and the arts. Philosophical realism encompasses different interpretations depending on the subject matter, such as scientific realism (about the existence of unobservable entities like electrons), moral realism (about the existence of objective moral facts), and metaphysical realism (about the existence of an independent, mind-independent world).

Historical Development of Realism

The concept of realism has evolved over centuries, with its roots traceable to ancient Greek philosophy. However, it has taken different forms across various historical periods and philosophical debates.

1. Ancient Greek Realism

Realism can be traced back to the early debates between Plato and Aristotle. Plato, often considered an idealist, believed in the existence of abstract, non-material forms or ideas that are the true reality, while the physical world is a mere reflection of these forms. Aristotle, on the other hand, took a more realist stance, arguing that reality consists of concrete objects that exist in the world and that our knowledge of these objects comes from empirical observation and experience. Aristotle’s emphasis on the reality of the physical world laid the foundation for later developments in realist thought.

2. Medieval Realism

In the medieval period, debates about realism were central to discussions about universals—abstract entities like "redness" or "beauty." Philosophers such as Thomas Aquinas and John Duns Scotus argued that universals have a real, independent existence, though their existence is different from that of individual objects. This form of realism, known as moderate realism, held that universals exist but only in particular instances in the world. In contrast, nominalists like William of Ockham argued that universals are merely names or concepts that we use to describe groups of individual things, without any independent existence.

3. Early Modern Realism

During the Enlightenment, realism took on new forms with the rise of empiricism and the scientific revolution. Philosophers like René Descartes, John Locke, and Thomas Hobbes all engaged with realist ideas in different ways. Locke, for example, was a proponent of representational realism, the idea that we perceive the world indirectly through mental representations of objects, but that these objects exist independently of our minds. This was a response to the skeptical challenge of whether we can truly know an external world. Descartes, while often associated with dualism, also argued for the existence of a material world separate from the mind, although he believed that human knowledge of this world was mediated through reason.

4. 19th- and 20th-Century Realism

In the 19th century, realism became a dominant theme in both philosophy and art. Philosophical realism was further developed in response to idealism, particularly the German idealism of thinkers like Hegel, which emphasized the role of consciousness in shaping reality. Philosophers like Charles Sanders Peirce and William James in the United States developed forms of realism within the framework of pragmatism, which stressed the importance of practical experience in understanding reality.

In the 20th century, realism continued to develop through movements like logical realism and scientific realism. Logical realism emerged with analytic philosophers like Bertrand Russell, who argued that the world is composed of facts and that our knowledge of the world is grounded in logical analysis. Scientific realism gained prominence with philosophers of science like Karl Popper and Hilary Putnam, who defended the view that scientific theories describe not only observable phenomena but also unobservable entities, such as electrons or quarks, that exist independently of human perception.

Types of Realism

Realism manifests in different forms depending on the area of focus. Below are some of the most significant types of realism in philosophy:

1. Metaphysical Realism

Metaphysical realism is the view that the world exists independently of our thoughts, beliefs, and perceptions. According to this view, there is a fixed reality made up of objects, events, and entities that exist whether or not we are aware of them. Metaphysical realism is often contrasted with idealism and anti-realism, which hold that reality is dependent on human minds or that reality is constructed through language, perception, or social interactions.

2. Scientific Realism

Scientific realism is the position that the theories and models used in science aim to describe the world as it really is, including both observable and unobservable entities. For example, scientific realists believe that entities like electrons, black holes, and gravitational waves exist independently of human observation and that scientific inquiry can give us true or approximately true descriptions of these entities. Scientific realism opposes instrumentalism, which views scientific theories as useful tools for predicting phenomena but not necessarily as true descriptions of reality.

3. Moral Realism

Moral realism holds that moral facts exist independently of human beliefs or feelings. According to moral realism, there are objective truths about what is right and wrong, good and bad, that are not merely a matter of individual or cultural opinion. Moral realists argue that moral statements can be true or false, much like statements about physical objects, and that these truths are discoverable through reason or experience. Moral realism is often contrasted with moral anti-realism, which denies the existence of objective moral facts and holds that moral judgments are subjective or culturally relative.

4. Epistemological Realism

Epistemological realism is the view that we can have knowledge of the external world as it exists independently of our minds. It asserts that our perceptions and beliefs about the world correspond to reality, and that objective truth is attainable through empirical observation, reason, or scientific investigation. Epistemological realism is opposed to skepticism, which doubts the possibility of objective knowledge, and to constructivist views, which suggest that knowledge is shaped by human perspectives or social contexts.

5. Naïve Realism

Naïve realism, also known as direct realism, is the belief that the world is exactly as we perceive it to be through our senses. According to naïve realists, when we see an object, we are directly perceiving the object itself, rather than a mental representation or interpretation of the object. Naïve realism is contrasted with representational realism, which holds that our perceptions are mediated by mental representations, and thus, we do not have direct access to the external world.

6. Aesthetic Realism

In aesthetics, realism refers to the depiction of subjects in art, literature, and other forms of cultural expression in a way that aims to represent reality as it is, without idealization or romanticism. Realism in art emerged in the 19th century as a reaction against romanticism, focusing on the lives of ordinary people and portraying social issues, hardships, and the material conditions of everyday life. Writers like Gustave Flaubert and Charles Dickens and painters like Gustave Courbet and Jean-François Millet are examples of realists in their respective fields.

Realism in Philosophy of Science

Realism has played a central role in the philosophy of science, particularly in debates about the nature of scientific theories and the status of unobservable entities. Scientific realists argue that successful scientific theories give us true or approximately true descriptions of both observable and unobservable aspects of the world. For example, scientific realists believe that the existence of atoms, even though they cannot be directly observed, is confirmed by the success of atomic theory in explaining various phenomena.

One of the main challenges to scientific realism comes from the problem of theory change: throughout history, many scientific theories once considered true have been replaced by newer theories. This has led some philosophers, like Thomas Kuhn, to argue for a more skeptical view of scientific knowledge, suggesting that scientific theories are shaped by paradigms that shift over time rather than by a direct reflection of objective reality.

Criticisms of Realism

While realism is a widely accepted and influential view, it has faced several criticisms:

1. Anti-Realism

Anti-realists argue that our understanding of the world is not about discovering an objective reality but about constructing frameworks for interpreting and organizing our experiences. Anti-realists, particularly in epistemology and philosophy of science, argue that what we call "reality" is shaped by human perception, language, and cultural practices. They claim that we cannot access reality independently of our conceptual frameworks.

2. Phenomenalism

Phenomenalists argue that we can only know things as they appear to us, not as they are in themselves. According to this view, objects do not exist independently of our perception; rather, they are the sum of the experiences we have of them. Phenomenalism questions the realist assumption that there is a mind-independent world that we can know through empirical investigation.

3. Relativism

Relativism challenges the idea of objective truth and reality, suggesting that truth is relative to different cultures, perspectives, or individuals. From this perspective, realism is problematic because it assumes that there is one fixed reality that everyone can access in the same way. Relativists argue that different people or groups may have different, equally valid interpretations of reality, shaped by their social and cultural contexts.

The Bottom Line

Realism is a philosophical doctrine asserting that reality exists independently of human perception, belief, or consciousness. It encompasses various forms, including metaphysical realism, scientific realism, moral realism, and epistemological realism, each focused on the independent existence of different aspects of reality—whether they be physical objects, scientific entities, moral facts, or knowledge of the external world.

Realism contrasts with idealism, anti-realism, and constructivist perspectives, all of which question the independence of reality from human thought or perception. Although realism has faced challenges from philosophical movements like skepticism, phenomenalism, and relativism, it remains a foundational view in philosophy, science, and everyday reasoning about the world.