A Short History of Coaching: From the Inner Game to the ICF

Coaching can seem like a very recent profession, and in one sense it is. The organizations, credentials and ethics codes that shape it today mostly date from the 1990s or later. But the ideas underneath, especially the belief that people learn more from noticing than from being told, go back a little further.

One common starting point for the story is a tennis court in California in the early 1970s. From there, the thread runs through British business coaching in the 1980s and 1990s, the founding of professional bodies, and a steady push toward shared standards.

This guide walks through that history in brief. It is not a complete account, and some details are contested, but knowing where coaching came from makes it easier to understand what it is trying to do, and what it is not.

The Inner Game: Learning by Noticing

Tim Gallwey was a nationally ranked junior tennis player who later captained his Harvard University team. After starting a career in college administration, he became a tennis instructor in Monterey, California. According to his official biography, he found that inviting students to focus their awareness on their strokes improved their technique more naturally than instruction did. In the biography's words, "By quieting self-interference, they were more able to tap into their natural abilities with greater ease."

He set out the approach in The Inner Game of Tennis, first published in 1974. The book's central idea, as Gallwey wrote, is that "Every game is composed of two parts, an outer game and an inner game." The outer game is played against an opponent. The inner game is played within the player's mind, where the main obstacles are self-doubt and anxiety.

Gallwey went on to write about skiing, golf, music, work and stress, and to apply the same methods with corporate clients. His own site says his work "has often been credited as the foundation of the new fields of corporate and life coaching." That is a claim from people close to his work, but the core shift he described, from instructing to raising awareness, is visible in nearly every coaching model that followed.

From Sport to Business: John Whitmore and GROW

Sir John Whitmore (1937 to 2017) came to coaching from motor racing, where he was a British and European saloon car champion. He co-founded Performance Consultants, a coaching and leadership development firm that still publishes his work.

Whitmore's book Coaching for Performance introduced the GROW model (Goal, Reality, Options, Will) to a wide business audience in 1992. Performance Consultants describes GROW as created in the late 1980s and early 1990s by Whitmore "and his peers," and other coaches are also credited with shaping it. The book reached a sixth edition in September 2024, co-authored by Tiffany Gaskell, and the firm reports more than a million copies sold in over 20 languages.

Whitmore's summary of the purpose of coaching is still widely quoted: "Coaching is unlocking people's potential to maximize their own performance." You can hear Gallwey's influence in it. The coach does not supply the performance; the coach helps remove what gets in its way. For the fuller story of who contributed what to GROW, see our guide to the GROW model.

The 1990s: Coaching Organizes Itself

As coaching spread, practitioners began building institutions around it.

• 1992: The European Mentoring Centre was founded. It later became the European Mentoring and Coaching Council and, in 2023, was renamed EMCC Global.
• 1995: Thomas Leonard, "with support of others," founded the International Coach Federation (ICF) in the United States, according to the ICF's own history, as a place for coaches to support one another and build a credible profession.
• 1996: The ICF launched its first chapters, along with its first president, board, newsletter and annual conference.
• 1998 to 1999: Through a merger with an organization the ICF history calls PPCA, and through the creation of core competencies, credentialing, a code of ethics and accreditation of training programs, the ICF set out the standards that still define much of the field.

That last step matters. Before it, "coach" described an activity. Afterward, there was at least a shared, voluntary benchmark for what competent and ethical coaching should look like.

The 2000s and 2010s: Growth and Shared Ethics

The ICF reports that its global membership tripled between 2000 and 2005. In 2007 and 2008 it released its Global Coaching Study, and in 2009 to 2010 it welcomed its first global board president from outside North America, a sign of how international the field had become.

Other bodies grew in parallel. In 2016, the European Mentoring and Coaching Council and the Association for Coaching wrote the Global Code of Ethics, which now has a dozen signatory organizations and was updated to its fourth version in December 2025.

Research grew too. In a 2023 paper in Frontiers in Psychology, coaching researchers Sandra Diller and Jonathan Passmore described coaching in organizations as having emerged over the previous two decades as a popular human resource development intervention. They also pointed to a problem that history has not solved: coaching is an unregulated profession, so almost anything can be called coaching.

2020 and After: A New Name, Screens and AI

In 2020, its 25th anniversary year, the International Coach Federation renamed itself the International Coaching Federation and reorganized into a group of six organizations. The same year, the COVID-19 pandemic pushed much of coaching onto video. Diller and Passmore note that coaching was increasingly delivered digitally as a result.

In 2023, the ICF launched a certification in team coaching and reported reaching 50,000 credential-holders living and working in more than 140 countries. In its 30th year, 2025, the ICF announced what it called a significant transformation for "a new era of coaching excellence." Meanwhile, AI coaching tools have raised a new version of the old question: Diller and Passmore's study distinguishes digital coaching, a live conversation between a human coach and a human client, from AI coaching.

What the History Teaches

A few threads run from the tennis court to today:

• Awareness before advice. From Gallwey onward, the coach's main tool has been helping people notice what they are doing, not telling them what to do.
• Standards are voluntary. Credentials and ethics codes exist, but coaching is not a licensed profession, which is why checking a coach's training and code of ethics matters. Our guide on how to choose a coach covers what to ask.
• Boundaries matter. As the field matured, its ethics codes drew a clear line between coaching and therapy. Coaching does not diagnose or treat mental health conditions. If you are struggling, a licensed mental health professional is the right place to start, and in a crisis in the United States you can call or text 988.
• The format keeps changing. Coaching moved from courts to offices to screens, and now faces questions about AI. The core idea has stayed recognizable throughout.

Key takeaways

• Tim Gallwey's The Inner Game of Tennis (1974) introduced the idea that reducing inner interference, rather than adding instruction, improves performance.
• Sir John Whitmore's Coaching for Performance brought the GROW model to a broad business audience in 1992.
• The ICF was founded in 1995 by Thomas Leonard and others, and built core competencies, credentials and an ethics code in the late 1990s.
• Shared ethics grew through the ICF's code and the Global Code of Ethics, first written in 2016.
• Coaching remains unregulated, so voluntary credentials and clear boundaries with therapy are central to its credibility.

Sources

• The Inner Game, About Tim Gallwey
• The Inner Game, The Inner Game Books
• Performance Consultants, Sir John Whitmore
• Performance Consultants, Coaching for Performance
• International Coaching Federation, ICF History
• EMCC Global, About
• Global Code of Ethics for Coaches, Mentors and Supervisors
• Diller and Passmore, Defining digital coaching: a qualitative inductive approach, Frontiers in Psychology (2023)