At university in Lima, the textbook I carried into every class was Principles of Marketing by Philip Kotler, often called the father of modern marketing. Decades and many editions later, Kotler is still in the conversation, partly because the discipline keeps changing in ways he keeps describing first. With about a century of formal history, marketing has now passed through 7 distinct eras, all of them still partly running in parallel.
What marketing is
The American Marketing Association, the canonical body for the discipline, defines it as “the activity, set of institutions, and processes for creating, communicating, delivering, and exchanging offerings that have value for customers, clients, partners, and society at large.” That’s the academic definition, and it’s deliberately broad. It covers the entire arc from research and product design through advertising, distribution, and post-sale relationship.
Kotler himself has often described it more practically. Marketing is the science and art of exploring, creating, and delivering value to satisfy the needs of a target market at a profit. That working definition adds two ideas the AMA’s leaves implicit: the artistry of the work, and the commercial reality that good marketing returns more than it costs.
Seth Godin, perhaps the most quoted voice in modern marketing thinking, takes a different angle. In This Is Marketing, he writes that “marketing is the generous act of helping someone solve a problem. Their problem.” It’s a one-line reframe of the discipline as service rather than persuasion, and it sits closer to how people doing the work experience it on a good day.
Three definitions (institutional, professional, philosophical) pointing at roughly the same thing. Create something valuable, tell the right people about it, help them get to it, and do it in a way that benefits everyone involved. With that as the floor, here is the arc the work itself has travelled.
7 eras
1.0 figured out how to make and move products at scale. 2.0 noticed there were people on the other end. 3.0 reframed those people as whole humans with values and meaning. 4.0 acknowledged the marketplace had moved online and was generating more data than humans could read. 5.0 asked how AI could amplify all of that for human ends. 6.0 saw that physical and digital had stopped being separate channels. 7.0 worries that AI optimisation is hollowing out the very thing it was meant to serve.
Each era is partly a correction of what the previous one missed. The labels make it sound like a software upgrade cycle. The substance is more like a hundred-year conversation a discipline has been having with itself about what it’s actually for.
Product era (Marketing 1.0)
The product at the centre: make enough, move it, sell it.
The first era began during the industrial revolution, when demand outstripped supply. Mass production was the breakthrough; the challenge was simply making enough. Marketing in this era was tactical and product-focused: cheapest way to make it, cheapest way to ship it, cheapest way to push it through retail. Henry Ford’s “any colour, so long as it’s black” captures the era. You sold what you could make.
Customer era (Marketing 2.0)
The customer at the centre: differentiate, position, retain.
As markets matured and competition rose, supply caught up to demand and then overshot it. Mass production became commodity production. Differentiation, positioning, and segmentation became the way to win, and strategy started outpacing tactics. The customer moved to the centre of the picture. The goal shifted from selling to satisfying, then from satisfying to retaining, because acquiring a new customer costs an estimated 5 to 7 times more than keeping an existing one. This is the era of the 4 Ps, customer relationship management, and brand positioning as the central craft.
Most brands I’ve watched in practice are still bouncing between Marketing 1.0 and 2.0. They run a customer-segment campaign one quarter and revert to feature-led discounting the next. The basics turn out to be harder to keep doing than the new books make them sound. That’s not necessarily a failure (operating well in 2.0 is harder than it looks), but it’s worth naming.
Human era (Marketing 3.0)
The whole human at the centre: values, meaning, purpose.
Kotler’s Marketing 3.0: From Products to Customers to the Human Spirit (2010) named a shift that had been quietly building. New technologies, the post-financial-crisis loss of trust in institutions, and people’s growing interest in expressing creativity, values, and even spirituality all combined to reframe the relationship between brand and audience. Marketing 3.0 asks marketers to see people as whole human beings: with minds, hearts, and a sense of purpose.
The new tools were specifically suited to that human-centric work: gamification (applying game mechanics outside games), storytelling (narrative as the carrier of meaning), and the fast rise of social media. Brands that engaged with their audiences as collaborators started outperforming those that didn’t. The shift was real, even if many companies still struggle to operationalise it.
Digital era (Marketing 4.0)
The journey at the centre: digital layers on traditional, and everything becomes measurable.
Kotler’s Marketing 4.0: Moving from Traditional to Digital (2017) was less a manifesto and more a practical bridge. Digital was layering on top of traditional marketing. Big data made real-time understanding of the market possible. Customer journeys became measurable across channels. Predictive analytics reshaped media buying. The customer became unambiguously omnichannel, moving between web, mobile, in-store, social, email, and back again, expecting consistency throughout.
The most useful idea in 4.0 was probably the new model of customer loyalty. Instead of the classic AIDA funnel (Attention, Interest, Desire, Action), Kotler proposed the “Five As”: Aware, Appeal, Ask, Act, Advocate. Advocacy as the new measure of loyalty. The most loyal customer was the one who recommended you to others.
Technology for humanity (Marketing 5.0)
Humanity at the centre, technology as the amplifier.
Kotler’s Marketing 5.0: Technology for Humanity (2021) is a synthesis. It picks up the human centricity of 3.0 and the technology empowerment of 4.0 and asks how to use what’s now possible (AI, natural language processing, sensors, robotics, AR/VR, IoT, blockchain) to advance human needs. The book draws inspiration from Japan’s Society 5.0 framework: technology in service of a sustainable human future.
The formal definition Kotler offers is “the application of human-mimicking technologies to create, communicate, deliver, and enhance value across the customer journey.” In practice, that translates into a working playbook: data-driven marketing, predictive marketing (running campaigns on the model of likely future behaviour), contextual marketing (content that adapts to the moment of consumption), augmented marketing (AI assistants making front-line marketers more productive), and “segments of one”: personalisation that scales by treating every individual as their own segment.
What makes the framework useful is that it treats technology as a means to specific human outcomes. The brands doing this well are the ones whose technology choices serve those outcomes rather than chasing tech for its own sake. A chatbot that genuinely helps a customer is Marketing 5.0; a chatbot that exists because every brand has one is just brand theatre.
Immersive era (Marketing 6.0)
The experience at the centre: physical and digital as one continuous reality.
Marketing 6.0: The Future is Immersive (2023) names this stage metamarketing: the deliberate convergence of physical and digital experiences into one continuous customer reality. Kotler reframes the underlying shift as a progression: multichannel (channels operate in parallel) to omnichannel (channels integrate but stay distinguishable) to metamarketing (channels dissolve into a single immersive experience).
The target audience is Generation Z and Generation Alpha, the first “phygital natives”: generations that don’t draw a hard line between online and offline because they grew up moving freely between the two. The toolkit includes extended reality (AR and VR), spatial computing, sensory marketing (engaging more than just sight and sound), and metaverse activations.
Reception of 6.0 has been more muted than the earlier books, partly because metaverse hype peaked and cooled in the same window 6.0 launched. The underlying argument that physical and digital are blending into one continuous customer reality is sound; it’s the metaverse-specific examples that have aged faster than the framework itself.
Mind-centric era (Marketing 7.0)
The mind at the centre: AI in the background, human understanding up front.
The newest book in the series, Marketing 7.0: A Guide for Thinking Marketers in the Age of AI (2026), is partly a corrective to the trajectory of 5.0 and 6.0. Kotler’s argument is that AI-driven performance optimisation, taken too far, hollows out the authenticity that makes marketing work in the first place. The proposed counterweight is mind-centric marketing: leveraging cognitive science, neuroscience, and behavioural understanding to design brand stories, value propositions, and customer experiences that resonate with how human minds work.
The new consumer in this framework is the “augmented human,” characterised as filtering, fragmented, and frugal. Filtering, because the volume of marketing messages is now overwhelming and people have learned to tune most of them out. Fragmented, because attention is split across more channels than ever. Frugal, because economic pressure and value-consciousness have raised the bar for what gets a yes.
The implication is that AI can do enormous work in the background (data, automation, personalisation), but the foreground decisions (what story to tell, what audience to seek, what value to promise) still need to come from a marketer who understands people. AI as a layer.
The integrated reality
Reading these eras as a linear progression is tempting and slightly misleading. None of the older eras has gone away. A small Australian SME making and selling soap, much like the businesses I consulted for before moving to Australia, is doing 1.0 marketing every time they ship a new product, 2.0 every time they segment their email list, 3.0 every time they share the maker’s story, and 4.0 every time they look at the analytics dashboard.
They’re doing 5.0 every time they let an AI tool draft the next subject line, 6.0 every time they design an in-store experience that picks up where their Instagram left off, and 7.0 every time they pause to make sure the AI-generated copy still sounds like a human wrote it. The job is the same. Only the toolkit has expanded.
The strategic mix matters more than the era. Traditional and digital, ATL and BTL, owned and earned and paid, online and in-store. The customer doesn’t experience these as separate channels; they experience your brand as one continuous thing across all of them. The discipline of marketing today is increasingly the discipline of integration.
A century in, the basics haven’t really changed: an audience whose problem you can solve, something they’ll value, clear communication, good delivery, and a relationship that makes them want to come back. Not the newest tool, but the clearest answer to: who is this for, and why should they care?
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