Metaphysical naturalism

Some people have a big idea about our world. They believe that only nature is real. This means they do not believe in ghosts. They also do not believe in souls.

These people think nature explains everything. They believe the Big Bang was a natural event. They think life grew through natural ways too. This way of thinking helps people do science.

They use reason to find out what is true. They look for facts in the world. This helps them learn how things work. Do you wonder how the world began?

Some people have a big idea about our world. They call this idea metaphysical naturalism. This view says that only nature is real. It means everything can be explained by natural things. These people do not believe in the supernatural. They do not believe in ghosts or souls.

This way of thinking helps people do science. Science works by looking for natural reasons for things. Many naturalists believe that the Big Bang was a natural event. They think the solar system formed in a natural way too. They also believe that life grew through evolution.

Naturalists think the mind comes from the brain. They say that brain changes can change how we think. Some thinkers use this to argue against the idea of a soul. However, other people disagree with this view. Some say that our thoughts might just be physical causes. They wonder if we can truly trust our own reason. They ask if evolution could make our minds reliable. It is a big question that many people still think about.

Metaphysical naturalism is a big way of seeing the world. It is also called ontological naturalism or philosophical naturalism. This view says that only natural things really exist. These include the elements and rules studied by science. It rejects the idea of the supernatural. This means it does not include things like ghosts or spirits. Some thinkers say the cosmos is all there is. This idea can be a foundation for how we see reality.

This way of thinking works in a specific way. It suggests that everything can be explained through natural methods. These methods are similar to the ones used in science. This view is a type of philosophical monism. This means it looks for one single way to explain everything. It says that no thing exists beyond scientific explanation. If a thing happens, it must have a natural cause. This helps people look for truths about the world.

Many thinkers have shaped this idea over time. In the early 20th century, American philosophers used this term. Names like John Dewey and Ernest Nagel are important here. Others include Sidney Hook and Roy Wood Sellars. Today, most philosophers accept some form of naturalism. They might reject supernatural things but still study the human spirit. Some people, like David Chalmers, might want a higher bar for it. Others, like Alvin Plantinga, are known critics of this view.

Naturalism connects to science in many deep ways. It provides a basis for the scientific method. Science assumes that reality is consistent and objective. It also assumes that humans can perceive reality accurately. Naturalists believe the Big Bang was a natural event. They think the solar system formed through natural processes too. They also see evolution and the start of life as natural. This makes science a great tool for finding facts.

There are many different debates about these ideas. Some people argue that the mind and brain are one. Paul Churchland says brain damage changes the mind. This suggests the mind is not a separate soul. However, others like C.S. Lewis had different ideas. He spoke about the difficulty of naturalism and reason. Alvin Plantinga argued that evolution might not make our thoughts reliable. These big questions keep many thinkers busy today.

Metaphysical naturalism is a philosophical worldview regarding the nature of reality. It is also known as ontological naturalism, philosophical naturalism, or antisupernaturalism. This perspective holds that only natural elements, principles, and relations exist. These are the same types of things studied by the natural sciences. Consequently, this view rejects supernatural concepts and explanations found in many religions. Some thinkers, like Carl Sagan, suggest that the Cosmos is all that is, ever was, or ever will be.

Philosopher Arthur C. Danto describes naturalism as a species of philosophical monism. Monism is the idea that everything can be explained by one single system. In this case, everything that happens is natural and susceptible to explanation. These explanations are continuous across different domains of objects and events. While science is the primary example, naturalism suggests these methods apply everywhere. It is often defined by what it rejects. It repudiates the idea that any entities exist beyond the scope of scientific explanation.

Naturalism is closely linked to the foundation of scientific inquiry. While methodological naturalism is a strategy used within science, metaphysical naturalism provides an ontological foundation. Methodological naturalism is the assumption that science must investigate nature as if nature is all there is. This is done as a working hypothesis to ensure scientific success. It does not require a scientist to believe in the ultimate truth of metaphysics. However, science relies on certain assumptions. These include the belief that reality is objective and consistent. It also assumes humans can perceive reality accurately and that rational explanations exist.

Historically, the term "naturalism" gained specific usage in the early 20th century. American philosophers such as John Dewey, Ernest Nagel, Sidney Hook, and Roy Wood Sellars helped trace its current usage. Today, many philosophers accept naturalism in a broad sense. They may reject supernatural entities while still using science to study the human spirit. However, some thinkers like John McDowell, David Chalmers, and Jennifer Hornsby have different views. They might prefer to set a higher bar for what counts as naturalism. Meanwhile, theologians like Alvin Plantinga offer critiques of the worldview.

Within this worldview, many naturalists adopt materialism or physicalism. Materialism is the belief that everything consists of matter and physical processes. This leads to specific views on the origins of the universe. Naturalists believe the Big Bang and the formation of the Solar System were natural phenomena. They also view abiogenesis, the origin of life, and evolution as processes without supernatural influence. Regarding the human mind, naturalists generally reject the idea of a soul or spirit. They do not believe in ghosts or substance dualism. Instead, they view the mind as a product of natural processes.

One major argument for naturalism involves the relationship between the brain and the mind. Paul Churchland argues against mind-body dualism by pointing to brain damage. He notes that mental properties are significantly changed when the brain is injured. If the mind were a separate, immaterial substance, it should not be so easily damaged by physical injury. Neuroscientists have shown that manipulating specific brain areas produces reliable mental changes. This suggests a causal relationship between the brain and mental states. Critics like Edward Feser and Tyler Burge call these arguments "neurobabble." They believe these findings might still be compatible with other metaphysical ideas.

There are also significant arguments against metaphysical naturalism. The "argument from reason," associated with C.S. Lewis, suggests a logical problem. It postulates that if all thoughts are just physical causes, we cannot assume they are reasonable. If thoughts are merely the result of physical effects, we have no grounds to trust our reasoning. Alvin Plantinga also proposed the "evolutionary argument against naturalism." He argues that the probability of evolution producing humans with reliable true beliefs is low. He suggests that without guidance, our cognitive faculties might not be reliable. These debates continue to shape modern philosophy and science.