By the mid‑20th century, psychology was like a family stuck at Thanksgiving dinner. On one end of the table, Behaviorism was insisting humans were basically pigeons in boxes, pecking levers for snacks. On the other end, Psychoanalysis was sighing dramatically, reminding everyone that we’re doomed by repressed childhood traumas and unconscious desires.
Both camps had their insights, sure. But they also made life sound kind of like a bleak sitcom: laugh track optional.
Was there no room in psychology for joy, creativity, or even a little hope?
Enter the Third Force: Humanistic and Existential Psychology. These approaches stood up from the table, cleared their throat, and said, “Excuse us, but people aren’t just rats in mazes or bundles of repressed drives. They’re capable of freedom, growth, and meaning.”
It was psychology’s equivalent of opening the curtains, letting in some good old-fashioned sunlight, and saying, “Hey, maybe life doesn’t have to be all doom and lever‑pressing gloom.”
The Problem They Tried to Solve
Before the 1950s, psychology had two very loud voices. Freud was whispering in one ear that we’re puppets of our unconscious, forever replaying childhood dramas like a broken record. Meanwhile, Skinner and the Behaviorists were in the other ear saying, “Forget all that. You’re just a pigeon in a box, pecking for pellets.”
Both perspectives stripped away something essential: the idea that humans are free agents who can choose, grow, and create meaning. If you listened to them too long, you’d start to believe life was either a horror story written by your unconscious or a never‑ending episode of My Life as a Lab Rat.
Humanistic and Existential psychologists weren’t having it. They wanted to restore the missing piece: dignity. They believed psychology shouldn’t just be about diagnosing illness and that it should also be about celebrating potential. They wanted to study what makes life worth living, not just what makes it miserable.
In other words, they asked: What if psychology wasn’t just about illness, but about wellness? What if instead of asking “What’s wrong with you?” we asked “What could you become?”
Humanistic Psychology and The Science of Growth
As the “psychology of the self”, Humanistic psychology was the sunshine side of the Third Force. It focused on free will, creativity, and the drive toward personal growth.
The poster child here was Abraham Maslow, who gave us the hierarchy of needs.
Imagine a pyramid. At the bottom: food, water, safety. Above that: love, belonging, friendship. Higher up: esteem, confidence, achievement. And at the very top: self‑actualization and becoming the fullest version of yourself.
Maslow argued that once your basic needs are met, you don’t just sit there like a satisfied potato. You naturally strive to grow.
It’s like being a tomato plant: first, you need soil, water, and sunlight, but once you’re stable, you don’t just stop. You grow, ripen, and (if you’re lucky) become the juiciest tomato in the garden. Self‑actualization is the psychological equivalent of that final, glorious ripeness.
Maslow even studied people he thought had reached this tomato‑like state (Einstein, Eleanor Roosevelt, creative artists at their peak) to see what made them tick. He found qualities like authenticity, creativity, and a deep sense of purpose.
Then there was Carl Rogers, who revolutionized therapy by saying, “What if we stop treating patients like broken machines and start treating them like humans?”
Radical, I know.
Rogers introduced client‑centered therapy, where the therapist wasn’t a stern authority figure but rather they were a supportive partner. His big idea was unconditional positive regard, the belief that people thrive when they feel accepted without judgment.
We’ll return to our gardening metaphor here. Try to grow a plant in toxic soil, and it struggles. But give it sunlight, water, and space, and it flourishes.
Rogers believed people are the same way: with empathy, authenticity, and acceptance, they naturally move toward growth and healing. Therapy wasn’t about “fixing” people. It was about creating conditions where they could blossom!
Humanistic psychology was, at its heart, optimistic. It believed that humans are inherently good, capable of creativity, and driven to grow when given the chance.
Existential Psychology and The Science of Meaning
If Humanistic psychology was the sunshine and tomato metaphors, Existential psychology was the moody, philosophical sibling. It wasn’t afraid to ask the big, uncomfortable questions: What does it mean to be free? To face death? To live authentically in a world that doesn’t come with instructions?
Rollo May brought existential ideas into American psychology.
He argued that being human means living with freedom, and with that freedom comes anxiety. Every choice matters, and that responsibility can feel overwhelming. To be human, he said, is to stand at the crossroads of possibility, which is both exhilarating and terrifying.
Very importantly, May also believed anxiety wasn’t just a symptom to medicate away. It was a signal that we’re confronting life’s big questions. In May’s view, facing that anxiety honestly, instead of avoiding it, is how we grow.
Then came Viktor Frankl, perhaps the most powerful voice of existential psychology (and a personal favorite of mine). A Holocaust survivor, Frankl wrote the classic Man’s Search for Meaning, describing how even in the most brutal conditions, people could find purpose.
His therapy, logotherapy, was built on the idea that humans are motivated not by pleasure (Freud) or reinforcement (Skinner), but by the search for meaning. Even in suffering, Frankl argued, we can choose our attitude and find purpose.
In other words, life doesn’t stop being meaningful just because it’s hard.
Existential psychology didn’t sugarcoat anything. It boldly looked suffering, mortality, and isolation straight in the eye. But, most importantly, it also insisted that in facing these realities, we discover freedom and purpose.
Why the Third Force Was Unique
Humanistic and Existential psychology were unique because they re‑centered the human experience. They didn’t reduce people to machines or unconscious drives. They treated people as whole beings who are capable of choice, growth, and meaning.
This was a revolutionary leap forward in psychology’s history.
Therapy wasn’t just about reducing symptoms anymore; it was about helping people live authentically, grow creatively, and find purpose. Education wasn’t just about memorizing facts; it was about nurturing curiosity and self‑expression. Leadership wasn’t just about control; it was about empowering people to flourish.
The Third Force also blurred the line between psychology and philosophy. Humanistic ideas really resonated with the optimism of the 1960s, fueling the self‑help movement and personal growth seminars. Meanwhile, Existential ideas resonated with people facing uncertainty, inspiring art, literature, and cultural movements that wrestled with freedom and meaning.
More than anything, the Third Force reminded psychology and the world that being human isn’t just about surviving. It’s about choosing, creating, and becoming.
The Legacy of Humanistic and Existential Psychology
Though the “Third Force” no longer exists as a standalone school, its fingerprints are everywhere.
Positive psychology, with its focus on happiness, flow, and strengths, is basically Maslow and Rogers with a modern data set. Coaching, counseling, and wellness movements all echo the humanistic belief that people are wired for growth.
Existential therapy continues to help people confront mortality, freedom, and meaning. Therapists still regularly draw on Frankl and May when guiding clients through crises of purpose and identity.
Of course, education has also been reshaped by humanistic ideas, moving classrooms away from rote memorization and toward creativity and self‑expression. Even modern management styles with their buzzwords like “purpose,” “authenticity,” and “growth mindset” owe a debt to the Third Force.
And culturally? The echoes are absolutely everywhere.
From mindfulness apps to Instagram affirmations, from TED Talks to motivational posters, the language of growth, authenticity, and meaning has seeped into daily life. Even the idea of “self‑care” carries the humanistic belief that nurturing the self is essential to flourishing.
The Third Force made a huge mark on psychology, but most importantly, it changed how we talk about what it means to be human.
Tomato Takeaway
After decades of psychological research (and two world wars), Humanistic and Existential psychology brought hope back into the picture. They reminded us that humans aren’t just machines or bundles of drives. We’re free, creative, and capable of meaning.
So here’s your Tomato Takeaway for this article:
If you were climbing Maslow’s pyramid, what would be waiting for you at the top: self‑actualization, pizza, or maybe both? Drop your answer in the comments, and let’s compare pyramids!
And, speaking of feelings of hope and tomatoes, it would just feel wrong if I didn’t leave you with a little song that really just captures everything we’ve talked about in this article. It’s a wonderful and uplifting song that reminds us of the sunny days that are ahead of us if we hold on just a little longer!
I encourage you to check it out and reflect on what drives you forward and what you find hope and meaning in, especially when things get tough.
Fueled by coffee and curiosity, Jeff is a veteran blogger with an MBA and a lifelong passion for psychology. Currently finishing an MS in Industrial-Organizational Psychology (and eyeing that PhD), he’s on a mission to make science-backed psychology fun, clear, and accessible for everyone. When he’s not busting myths or brewing up new articles, you’ll probably find him at the D&D table or hunting for his next great cup of coffee.