Who was Freud and what did he say?

Famed psychologist Sigmund Freud believed dreams were symbolic expressions of desire

Austrian psychologist Sigmund Freud believed dreams should be interpreted using personal symbolism and free association, meaning relaxing the mind and waiting to see what concepts spontaneously erupt. Interpreting and unraveling these "involuntary ideas" is a precursor to understanding the psychology of neuroses, according to Freud.

Wilhelm Wundt, the forgotten father of modern psychology

He was the first psychologist to call himself one, and he influenced a whole generation of early psychologists. Learn about the life and works of Wilhelm Wundt with this thorough entry from a philosophy encyclopedia.

Browse and explore dozens of major psychology theories

There are a ton of different psych theories—so here's a breakdown of some of the major ones according to the general psychological focus.

What is Freud's idea of the unconscious?

The unconscious has become a widely used term, but Freud meant something quite specific. Here's a look into his technical use of the term.

Freud and Jung were once friends. What drove them to break up?

Austrian psychologist Sigmund Freud and Swiss psychiatrist Carl Jung were fast friends, immediately hitting it off the first time they met in 1907. This four-minute video dives into the intellectual divide that drove them apart.

The basics of behaviorism and its founder John B. Watson

Watson believed he could use classical conditioning to shape the behavior of infants toward positive outcomes, culminating in his famous "Little Albert" experiment. Here's a quick overview of his life and thought.

What is psychoanalysis?

This nine-minute video, the first of a four-part series, seeks to answer the questions: what is psychoanalysis, and is it weird? The answer to the latter question is overwhelmingly yes. The answer to the first question is a bit...

JJ Schildkraut theorized depression is linked to brain chemical imbalances—in 1965

Schildkraut was one of the first to put forward this idea, which stemmed from lab animal research. A decade later, researchers published the first landmark paper on fluoxetine—better known by trade name Prozac—which increases serotonin levels in the brain.

Socrates is considered by many the father of Western philosophy

We know Socrates mostly through the writings of Plato, one of his admirers. Plato's dialogues typically feature Socrates as the main speaker. His penetrating look at life's most important subjects—from the nature of justice and knowledge to the existence of gods—made him many enemies, and even led to his execution.

Existentialism inspired Franklin Roosevelt and Martin Luther King Jr.

The Danish philosopher, sometimes called “the father of existentialism,” believed that individuals needed to resist the temptation of conformity and instead discover their authentic selves. His work became remarkably influential in the 20th century. In 1944, Roosevelt said that reading Kierkegaard made him understand how the Nazis could’ve enacted so much violence. In 1959, King wrote that existentialism was “especially meaningful for our time.”

Sartre wrote an 8-hour screenplay for a Freud biopic

Sartre was hired to write the screenplay for what would eventually become John Huston's 1962 film "Freud: The Secret Passion," about the life of the psychoanalyst. Sartre, however, had trouble sticking to the parameters of Hollywood. An early draft was estimated to be five hours long. Rather than shortening it, as Huston suggested, Sartre extended it to eight hours and was eventually removed from the production.

Less than 1% of people globally have schizophrenia, a syndrome strongly linked to genetics

Schizophrenia's causes remain largely unknown, though scientists suggest it's caused by multiple factors. Its symptoms include disruption of thought processes rather than the exhibiting of multiple personalities. This brief video provides an overview of the condition.

What's the difference between a psychologist and a psychiatrist?

While both psychiatrists and psychologists are mental health professionals, the big difference is that psychiatrists are medical physicians (MD or DO) while psychologists are not. Learn what makes these two profession different with this brief explainer.

One US psychiatrist at Nuremberg viewed top Nazis like Göring as normal

The surviving leaders of the Nazi movement had overseen a catastrophic war and the cruel extermination of millions. US psychiatrist Douglas Kelley evaluated the 22 men ahead of their infamous trials, viewing them as intelligent, cultured men without a moral compass. Kelley would later die by suicide.

Picasso was one of the 20th century's most influential artists

The artist is recognized as one of the inventors of cubism, which simplified figures and scenes into flattened geometric shapes and imagined arrangements. The movement spurred new styles in response and led to increasingly abstract art. Styles like futurism, dada, De Stijl, and art deco were built on the simple forms, abstract ideas, collage, and found objects of early cubism.

The psychology of narcissism

It's not just an insult: Narcissistic personality disorder impacts thousands of people—and there are ways to get better. Here's a short video explaining it.

Everything you know about Phineas Gage is wrong

A stray spark sent a 3.5-foot-long, 1.25-inch thick iron rod through the brain of foreman Phineas Gage in 1848, creating a scientific case that has attracted onlookers for nearly two centuries. His life reportedly soon spiraled out of control, with his behavior tending toward selfishness and chaos. Evidence of these changes is far less common, with Gage's story bloated by fabrication, scientific prejudice, and artistic license.

How Alfred Hitchcock changed cinema

In 1960, Alfred Hitchcock changed moviegoing with "Psycho." At a time when audiences came and went during screenings, he enforced strict start times, banned late arrivals, and kept plot details secret. The result? A $32M hit that helped shape modern theater etiquette.

Take a deep dive into the neuron

Neurons are the basic unit of the brain and nervous system—electrically excitable cells that sends signals throughout the body. They can communicate with each other, fire in sequence, and conspire to do everything from drive body movement to help form memories. Check out this intro-level overview to learn more about their structure and how they work.

Everything scientists could learn by looking at your skull

Our skulls are all unique, but they also share characteristics across groups of people. In the absence of fingerprints, forensic scientists can learn a lot about you just from your skull.

Are you hypnotizable?

What causes some people to genuinely fall under the spell of hypnosis and others not? The technique only appears to work easily on about 10% of people, and a variety of both genetic and psychological factors determines one's susceptibility. Researchers suggest effective hypnosis has more to do with a person's self-control than with external influence—and the technique can have tangible benefits.

'Ogilvy on Advertising' is David Ogilvy's career memoir full of his favorite copywriting advice

Ogilvy is one of the most famous and influential advertising executives in history, known for his focus on research-driven advertising. But he also wrote multiple books, including "Ogilvy on Advertising," which the Founders podcast dives into in this episode.

Everything you need to know about WWI

Summarizing World War I seems like an impossible task, but this article makes a great effort at providing a easily digested survey of the Great War. Read about WWI from the first shots fired by assassin Gavrilo Princip at the Archduke Franz Ferdinand and his wife Sophie, to the various campaigns waged by the war's participants, to the equipment provided to the various fighting forces.

Dr. Bernard Fisher pioneered lumpectomy as a treatment for breast cancer

Dr. Bernard Fisher was a surgeon-scientist who developed and discovered cancer treatments that changed the way we treat and understand breast cancer. Despite these contributions, Fisher was also the subject of a congressional investigation that tarnished his reputation. Listen to the "Less Radical" six-episode podcast series covering the complex story of this influential doctor.

A sleep expert discusses the broad benefits of quality rest

In this three-part series, renowned sleep expert Matthew Walker and doctor Peter Attia explore the role of sleep in memory consolidation and mental health, and the detrimental effects of chronic lack of sleep. The latter has been linked to increased risk of dementia, hypertension, and more.

In recent years a child anxiety expert has created and tested a novel phobia and anxiety treatment approach for children, focused on changing how parents respond to the fears.

Against his wishes, Albert Einstein's brain was removed before his cremation, and the pathologist responsible stored it for decades in mason jars within a beer cooler.

Clever Hans was a 1900s horse that was believed to be able to solve math equations, tell time, and read and comprehend German, until a psychology student discovered how he got his answers.

Learn how your body is, scientifically, like a firework with its own slow, controlled burn.

Researchers believe the brain consolidates memories, processes emotions, and plans for the future during dream states

Warren Buffett's former professor Benjamin Graham is known as the 'father of value investing,' a strategy in which investors seek to buy stocks trading below their intrinsic worth.

Georgia O'Keeffe's flower paintings are often assumed to be sexual, though the artist claimed she was simply interested in highlighting the beauty of flowers that most people neglect

Salvador Dalí believed he was his own dead brother, who had died nine months before he was born

See 33 images that became central to huge scandals, including a young Charles and Camilla, Michael Jackson's baby on a hotel balcony, and Hugh Grant's mugshot.

Existentialist writer Jean-Paul Sartre coined the famous phrase 'Hell is—other people' in his play 'No Exit'

Explore an interactive map built from more than 100,000 survey responses on where people find joy in their lives

Chaos theory—informally known as the butterfly effect—is the reason why weather forecasts are presented with probabilities rather than certainties.

The US Constitution is widely regarded as the longest-standing written national constitution still in force—see how it has influenced rights worldwide.

After her fellow cult members tried to kill her with an LSD-infused hamburger, one member of the Manson Family, the murderous cult led by Charles Manson, decided to testify against the group's leader.

As of 2025, the most cited papers in science include a review of graphene, methods to improve image recognition, streamlining electron density calculations, and optimizing protein studies.

The Brothers Grimm were lawyers before they were storytellers, but became interested in fairy tales as they began investigating how rules and customs had been passed down through cultures.

The first horror movie is believed to be George Méliès' 1986 short 'The Haunted Castle,' which pioneered the use of special effects

SpaceX's S-1 or 'prospectus' revealed many previously unknown details about the company, including its unprofitability despite doing $18.7B in revenue in 2025, exactly how many voting shares Elon Musk will have in the company (roughly 85%), and more.

'Shogun,' a 1980s TV series, helped popularize sushi in the US by stimulating an American interest in Japanese culture.

Most of the observable universe's volume consists of voids and supervoids—enormous regions of space with little to no galaxies, stars, or light.

Many legends about George Washington, including his supposed wooden teeth and the story of cutting down the cherry tree, lack evidence.

How the most famous Ebola book, The Hot Zone, which sold 3.5 million copies and was translated into 30 languages, got aspects of the disease so wrong.

The first steps to rebuilding your credit score include getting to know exactly what's on your credit report and figuring out how far you are from the '700 club,' or 'good score' range.

A small portion of The Winstons' 'Amen, Brother,' an obscure '60s gospel record, is the basis for thousands of hip-hop tracks, making it one of the most sampled records ever that's informally known as 'the Amen break.'

Hear about the 250-year history of the United States Postal Service, complete with some of its strangest deliveries, important innovations, and the figures that made it an American institution.