🔍 Read the full analysis: A Job-Sector Primer: Field, Factory, And Office on ThorstenMeyerAI.com
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TL;DR
Thorsten Meyer’s Work After Work series began Nov. 2 with an explanation of the primary, secondary and tertiary sectors and how employment has shifted among them. The source cites long-term changes in the United States and other countries, while presenting a forecast that automation could become its own sector as Meyer’s thesis, not an established fact.
Thorsten Meyer published the first episode of Work After Work on Nov. 2, beginning a planned 60-episode series about how economies and jobs change. The opening installment introduces the primary, secondary and tertiary sectors—work associated broadly with the field, factory and office—and uses historical employment estimates to show the long shift away from farming.
The primer defines the primary sector as work that takes resources from nature, including farming, fishing and forestry; mining is included in many classifications but not all. The secondary sector makes or builds things, covering manufacturing, construction and energy. The tertiary sector includes services such as trade, transport, health care, education and government. Meyer uses a loaf of bread to illustrate the divisions: growing wheat, processing it, and transporting or selling the finished product.
The source reports that farming accounted for 73.7% of the U.S. labor force in 1800, according to estimates by economic historian Stanley Lebergott, compared with 12.0% in 1950. It cites the International Labour Organization’s modelled estimate that farming represented 1.5% of U.S. employment in 2025. These figures refer to different historical series and methods, so they describe a broad shift rather than a single continuous, directly comparable dataset.
The article also points to changes elsewhere: China’s primary-sector employment share fell from 83.5% in 1952 to 22.2% in 2024, while Japan’s census recorded a fall from 53.8% in 1920 to 3.2% in 2020. The source says that, in ILO modelled estimates, services have employed more people worldwide than farming since 2001. It also challenges the idea that the United States no longer makes things: U.S. factory employment is reported as about 35% below its June 1979 peak, while real manufacturing output in 2025 was about 1.9 times its 1979 level.
How the Work Shift Reshaped Economies
The three-sector model offers a simple way to understand a major change in working life: as productivity and technology alter how goods are produced, fewer workers may be needed in some activities, while employment grows in others. The figures in Meyer’s primer make that change visible across long periods and countries, from farming’s former dominance in the United States to the growth of service employment globally.
That history matters to current debates about automation and employment. The model does not establish that every worker displaced from one sector will find work in another, or that transitions will be smooth. It does provide a framework for asking where jobs are moving, what kinds of work are growing, and how technology affects the balance. Meyer says those questions will run through the series, including later episodes on machinery and chatbots.
The manufacturing comparison also cautions against treating job counts as a complete measure of production. The source’s figures show that factory employment can decline while measured output rises. That distinction is relevant to discussions of industrial capacity and economic change, though the figures alone do not explain the causes of the output increase or its effects on workers.
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The Model’s Economic Origins
The three-sector framework took shape in the first half of the 20th century. Meyer’s account traces the term “tertiary” to New Zealand economist Allan G. B. Fisher, who wrote a book in 1934 that was published in 1935. Colin Clark compared employment patterns across countries in The Conditions of Economic Progress (1940), helping establish the model as a way to describe shifts from agriculture to manufacturing and services.
French economist Jean Fourastié later argued in a 1949 book that services could absorb workers released as technology raised productivity in other sectors. That was an economic argument, not a guarantee that every change in technology would produce enough service jobs, or that the new jobs would be available to the same people.
The categories are useful but imperfect. Some jobs do not fit neatly into one box: a software engineer at a car manufacturer, for example, may be classified differently depending on the statistics being used. Mining is another boundary case, assigned to different sectors in different systems. The source presents the framework as a broad map of employment, not a precise description of every occupation.
““a vast miscellaneous residue of activity””
— Allan G. B. Fisher, as quoted in Thorsten Meyer’s article
Limits of the Sector Forecast
The source does not provide a method or detailed evidence for Meyer’s thesis that automation could become a separate sector within a decade or a few decades, doing up to 90% of work without a human hand. He explicitly labels that prediction a thesis, not a fact. The primer does not establish how “work” or an automation sector would be defined, or how such a forecast could be measured.
Employment statistics also depend on definitions, dates and methods. The source notes that mining can be classified differently and that some occupations straddle sectors. Its cited historical estimates are not all drawn from one consistent series. The figures support a broad account of structural change, but the article does not supply enough detail to independently reconcile every dataset or explain the specific causes behind each shift.
It is also unclear from this opening installment how the series will evaluate the effects of automation on wages, job quality, regional economies or workers who must change occupations. Those questions are not answered by a count of employment shares alone.
The Series Turns to Automation
Meyer says Work After Work is planned as a daily series of 60 episodes about how the economy is built, how work has moved and which tasks may remain human as machines take on more. The opening installment sets out the three-sector framework for that discussion.
The source identifies Episode 48 as the point when Meyer’s automation-sector thesis will be examined. It does not provide a publication calendar for all episodes or explain what evidence will be used to assess the forecast. Until then, the claim remains a stated thesis rather than a reported development or established outcome.
Key Questions
What are the three economic sectors?
The primary sector takes resources from nature; the secondary sector makes or builds things; and the tertiary sector provides services. The source gives farming, manufacturing and retail as examples.
When did services begin employing more people worldwide than farming?
According to the International Labour Organization’s modelled estimates cited by Meyer, services have employed more people worldwide than farming since 2001. The source does not give the underlying global employment totals in this excerpt.
Does the article say the United States no longer manufactures goods?
No. Meyer’s source rejects that claim, reporting that U.S. factory jobs were about 35% below their June 1979 peak, while real manufacturing output in 2025 was about 1.9 times its 1979 level.
Is automation already a separate economic sector?
The source does not establish that. Meyer says automation could become a sector of its own, but labels that idea his thesis, not a fact.
Source: ThorstenMeyerAI.com
