The Evolution of Emotional Intelligence: From Early Theories to Today

We talk about emotional intelligence like it’s always been part of the conversation – in classrooms, workplaces, and therapy rooms. But the concept didn’t arrive fully formed. It took nearly a century of evolving psychological thought, several bold theoretical leaps, and one massively popular book to bring emotional intelligence into the mainstream. Here’s how that journey unfolded.

The earliest seeds: social intelligence before “EQ” existed 🔗

The story of emotional intelligence begins well before the term itself was coined. The first recorded mention of a related concept goes back to 1909, when educational philosopher John Dewey described social intelligence as “the power of observing and comprehending social situations” in his work Moral Principles in Education. Dewey’s framing was broad and philosophical – but it planted an important seed: that navigating human situations required a distinct kind of intelligence.

Then came the work that truly set the field in motion. In the early twentieth century, psychologist Edward Thorndike separated intelligence into three types: abstract, mechanical, and social – the last of which reflected a person’s success in interpersonal situations. Writing in Harper’s Magazine in 1920, Thorndike defined social intelligence as “the ability to understand and manage men and women and boys and girls, to act wisely in human relations.” For a field that had been laser-focused on cognitive ability, this was a significant reframing. Thorndike was arguing that how well you understand and manage other people is itself a form of intelligence – not a personality quirk, not good manners, but a measurable, meaningful capacity.

David Wechsler and the “non-intellective” factors 🔗

Thorndike’s work didn’t immediately transform mainstream psychology, but it kept influencing those paying attention. One such researcher was David Wechsler, who in the 1940s built on this foundation. Wechsler recognized the effect of multiple factors on intelligent behavior and argued that models of intelligence would be incomplete until all those factors were fully understood. He referred specifically to what he called “non-intellective” elements – affective, personal, and social – as being essential to predicting a person’s ability to succeed in life. In other words, raw cognitive horsepower wasn’t enough. Emotions and social awareness mattered too. Wechsler didn’t use the phrase “emotional intelligence,” but he was pointing directly at it.

Around this same period, early studies began focusing on describing, defining, and assessing socially competent behavior – with Edgar Doll publishing the first instrument designed to measure socially intelligent behavior in young children in 1935. The intellectual groundwork was being laid, brick by brick.

The first appearance of “emotional intelligence” as a term 🔗

The actual phrase “emotional intelligence” surfaced earlier than most people realize. The term is first attributed to Michael Beldoch, a Clinical Professor of Psychology in Psychiatry at Cornell University, who used it in a 1964 research paper titled Sensitivity to Expression of Emotional Meaning in Three Modes of Communication. It appeared again in 1966 in a paper by German psychiatrist Hanscarl Leuner. These were academic publications with limited reach – the term had been born, but it hadn’t yet found its audience.

A more consequential early use came in 1985, when American researcher Wayne Payne included the term in an unpublished doctoral dissertation exploring the development of emotional intelligence in relation to self-integration and problem-solving. Then in 1987, Keith Beasley introduced the term “EQ” – Emotional Quotient – in an article published in Mensa Magazine, intentionally echoing the familiar “IQ” to suggest that emotional capacity could be measured in a similar way. These were early, scattered uses – but the vocabulary was coalescing.

Gardner’s multiple intelligences: redefining what “smart” means 🔗

While these developments were unfolding in relative obscurity, Howard Gardner was preparing a theory that would reshape how the world thought about intelligence altogether. Howard Gardner first proposed the theory of multiple intelligences in his 1983 book Frames of Mind, where he broadened the definition of intelligence and outlined several distinct types of intellectual competencies. Gardner’s challenge to the IQ-centric model of intelligence was direct: he argued that humans are not simply more or less intelligent, but rather differently intelligent across a range of domains.

Interpersonal and intrapersonal intelligences 🔗

Of Gardner’s original seven intelligences, two are particularly relevant to the story of emotional intelligence. Interpersonal intelligence, in Gardner’s view, concerned the capacity to understand the intentions, motivations, and desires of other people – the kind of intelligence that allows someone to work effectively with others. Intrapersonal intelligence, by contrast, entailed the capacity to understand oneself, to appreciate one’s own feelings, fears, and motivations, and to use that self-knowledge to regulate one’s life.

Gardner himself described these two as “personal intelligences” and treated them as a pair – closely linked in most cultures and most lives. Gardner has since equated this interpersonal intelligence with the emotional intelligence later described by Goleman. The connection is hard to miss: what Gardner called intrapersonal intelligence maps almost directly onto self-awareness and self-regulation; interpersonal intelligence maps onto empathy and social skill. Gardner didn’t use the term “emotional intelligence,” but his framework gave future researchers a sturdy conceptual platform on which to build it.

The academic breakthrough: Salovey and Mayer’s 1990 model 🔗

The year 1990 is widely considered the formal birth of emotional intelligence as a scientific construct. That year, psychologists Peter Salovey and John D. Mayer formally defined emotional intelligence as “the ability to monitor one’s own and others’ feelings and emotions, to discriminate among them, and to use this information to guide one’s thinking and actions.” Published in the academic journal Imagination, Cognition, and Personality, their landmark paper was the first serious attempt to treat emotional intelligence as an ability-based construct – something that could be measured, studied, and developed, rather than a loose collection of personality traits.

The four-branch model 🔗

Salovey and Mayer didn’t just name emotional intelligence – they structured it. Their model organized emotional intelligence into four branches: the perception, identification, and expression of emotion; using emotion to facilitate thinking; understanding and comprehending emotions; and the reflective regulation and management of emotion. Each branch built on the previous one, creating a hierarchy of emotional skills from the basic (recognizing a feeling in someone’s face) to the sophisticated (managing complex emotional states to achieve a goal).

This ability-based framework was deliberately rigorous. Mayer and Salovey formulated their model with a cognitive focus specifically in order to distinguish emotional intelligence from other personality traits. Their goal was to establish EI as a genuine form of intelligence – one that could be tested objectively, like verbal or mathematical ability. Their work laid the academic foundation that Daniel Goleman would later build on when he popularized the concept in 1995.

Goleman and the mainstreaming of emotional intelligence 🔗

What Salovey and Mayer established in academic journals, Daniel Goleman brought to the world’s living rooms. Goleman’s 1995 book, Emotional Intelligence: Why It Can Matter More Than IQ, generated enormous public appeal by focusing on EI’s connection to personal and professional success. The book became a bestseller and landed on the cover of Time magazine. Suddenly, “emotional intelligence” was a phrase people were using at dinner tables, in board meetings, and in school reform conversations.

Goleman’s framework and its departures from the original model 🔗

Goleman’s version of EI was broader – and more contested – than Salovey and Mayer’s original model. Goleman’s bestselling book began with the early version of their EI model but mixed in many other personality traits, including persistence, zeal, self-control, and character as a whole. He organized his framework around four components – self-awareness, self-management, social awareness, and relationship management – and argued that these skills predicted success in ways that IQ alone could not.

This expansion drew both admiration and criticism. Goleman made sweeping claims, suggesting that emotional intelligence accounted for “nearly 90% of the difference” between star performers and average ones – statements that many researchers found difficult to substantiate scientifically. Along with the popularization came many misconceptions about the construct – most problematically, Goleman’s description encompassed a wide range of valued human characteristics beyond the scope of emotional intelligence as strictly defined. In the decades that followed, academic researchers worked to separate the rigorous science from the popular narrative.

The lasting impact of popularization 🔗

Whatever its scientific limitations, Goleman’s contribution to the public understanding of emotional intelligence is undeniable. His work prompted organizations to incorporate EI assessments into hiring, schools to teach emotional skills alongside academic content, and mental health professionals to bring EI concepts into therapeutic practice. Following Goleman’s book, emotional intelligence became one of the most discussed concepts in psychology, education, and business. The conversation it started has never really stopped.

From debate to scientific consensus: the field matures 🔗

The tension between Goleman’s popular model and Salovey and Mayer’s ability-based model gave rise to a productive scientific debate. Researchers began distinguishing between “ability models” – which treat EI as a set of cognitive skills that can be objectively measured – and “mixed models” – which blend emotional abilities with personality traits and motivational factors. The Mayer-Salovey-Caruso Emotional Intelligence Test (MSCEIT), developed in 2002, became the most commonly used performance-based measure of EI, testing respondents on actual emotion-based problem-solving tasks rather than relying on self-report.

Reuven Bar-On contributed another influential framework: the model of emotional-social intelligence, which traced its conceptual roots all the way back to Darwin’s early work on the importance of emotional expression for survival and adaptation, as well as to Thorndike’s description of social intelligence from 1920. Bar-On’s work helped clarify that emotional and social intelligence, while related, are not identical – a distinction that continues to shape research today.

What these competing models share is more important than what divides them. Across all major frameworks, the core components have remained consistent: the ability to recognize, understand, and express emotions; the ability to understand how others feel and relate with them; the ability to manage and control emotions; and the ability to adapt and solve problems of a personal and interpersonal nature. The vocabulary has evolved, the models have been refined, and the measurement tools have grown more sophisticated – but the underlying insight has held firm across a century of research.

Why this history matters 🔗

Tracing the development of emotional intelligence from Thorndike’s 1920 article through Gardner’s multiple intelligences to Salovey, Mayer, and Goleman’s contributions reveals something important: the concept wasn’t invented – it was discovered, piece by piece, by researchers willing to look beyond IQ as the sole measure of human capability. Each generation built on the last, correcting earlier limitations and adding new precision. The result is a concept that now informs how we educate children, select leaders, train employees, and understand mental health.

Understanding where emotional intelligence came from also helps us use it more carefully. Knowing that the academic model is ability-based – grounded in specific, trainable skills – is quite different from treating EI as a vague cluster of positive personality traits. The history keeps the concept honest.

What do you think? Given that emotional intelligence took nearly a century to develop from Thorndike’s social intelligence into the structured frameworks we use today, which stage of that evolution do you find most significant – and why? If Gardner’s interpersonal and intrapersonal intelligences so closely mirror what we now call emotional intelligence, should they simply be considered the same thing?

References

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2. https://www.encyclopedia.com/social-sciences/applied-and-social-sciences-magazines/intelligence-social
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4. https://www.eiconsortium.org/reprints/bar-on_model_of_emotional-social_intelligence.htm
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6. https://infed.org/dir/welcome/howard-gardner-multiple-intelligences-and-education/
7. https://en.wikipedia.org/wiki/Theory_of_multiple_intelligences
8. https://nobaproject.com/modules/emotional-intelligence
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10. https://pmc.ncbi.nlm.nih.gov/articles/PMC10955050/
11. https://cdn2.psychologytoday.com/assets/attachments/1575/rp2008-mayersaloveycarusob.pdf
12. https://www.ijhssi.org/papers/v2(3)/version-2/H234251.pdf
13. https://www.salzburgglobal.org/fileadmin/user_upload/Documents/2010-2019/2018/Session_603/Brackett_et_al.__2016__Handbook_of_Emotion.pdf
14. https://pubadmin.institute/emotional-intelligence/evolution-of-emotional-intelligence-history