The Second Machine Age is Erik Brynjolfsson and Andrew McAfee’s best-known work. The book explores the profound implications of rapid technological advances, particularly in digital technologies, for society, the economy, and the labour market. Published in 2014, the book delves into the transformative effects of what the authors term the ‘second machine age,’ a period marked by exponential growth in computing power, the ubiquity of digital networks, and the rise of artificial intelligence (AI) and robotics (page 9). Through a well-structured narrative, Brynjolfsson and McAfee argue that while these technological advancements hold immense potential for economic growth and societal progress, they also present significant challenges, particularly in terms of inequality and the displacement of labour (pages 11-12). In this review we examine some of the book’s arguments, structure, and contributions to the wider ongoing discourse on technology and society.

Brynjolfsson and McAfee’s central thesis is that we are entering a new phase of technological advancement that is fundamentally different from the first machine age, which was characterized by the mechanization of manual labour through the invention of the steam engine and other machinery during the Industrial Revolution. The second machine age, in contrast, is driven by digital technologies that augment and, in some cases, replace cognitive tasks traditionally performed by humans (page 9).

Brynjolfsson and McAfee’s book is structured in a logical and accessible manner, making complex ideas about technology and economics understandable to a broad audience. The book is divided into three main sections: the first outlines the characteristics of the second machine age (chapters 1-6), the second discusses its implications for the economy and labour market (chapters 7-11), and the third offers potential solutions to the challenges posed by these technological changes (chapters 12-15).

The authors identify three key characteristics of the second machine age: (1) exponential growth in computing power, (2) digitalization, which allows information to be replicated at virtually no cost, and (3) combinatorial innovation, where new technologies are built upon existing ones, leading to rapid and often unexpected advances (page 37). The authors argue that these characteristics are driving unprecedented changes in productivity, business models, and the global economy (chapters 1-6).

A significant portion of the book is dedicated to discussing the implications of the technological changes for the labour market (chapters 7-11). Brynjolfsson and McAfee argue that while technology has always created winners and losers, the pace and scale of change in the second machine age are likely to exacerbate inequality. They point to the phenomenon of ‘skill-biased technological change’, where technology disproportionately benefits those with higher levels of education and skills, leading to a widening gap between high-skilled and low-skilled workers (page 134). This dynamic is further amplified by the ‘superstar’ effect, where a small number of highly skilled individuals and companies capture a disproportionate share of the economic gains from new technologies (page 150)

The authors also explore the potential for technological unemployment, where advances in AI and robotics could lead to the displacement of a significant number of jobs, particularly in sectors such as manufacturing, transportation, and even certain white-collar professions (page 173). However, they are careful to distinguish between short-term disruptions and long-term trends, noting that while some jobs will undoubtedly be lost, new opportunities will also emerge, particularly in areas that require creativity, complex problem-solving, and interpersonal skills (page 191).

One of the strengths of the book is its use of empirical evidence and real-world examples, the authors drawing on a wide range of data, from economic statistics to case studies of companies and industries that have been transformed by digital technologies. This evidence-based approach lends credibility to their analysis and helps to ground their sometimes abstract ideas in concrete realities.

However, a critic might argue that the book’s optimistic tone about the potential of technology to drive progress and prosperity is not sufficiently tempered by a consideration of the potential risks and downsides. While the authors do acknowledge the challenges posed by technological change, particularly in terms of inequality and job displacement, they tend to focus more on the potential benefits of innovation and less on the potential for negative outcomes, such as social unrest, the erosion of privacy and the proliferation of misinformation (e.g. fake news) in an increasingly digital world.

Moreover, while Brynjolfsson and McAfee offer several policy recommendations to address the challenges of the second machine age, such as investing in education, reforming the tax system, and fostering innovation (Chapter 13), some of the discussion around proposals such as higher tax rates, universal basic income and negative income tax may seem overly idealistic and difficult to implement in practice (Chapter 14). Some readers may find the patches of real-world naiveté throughout the concluding chapters off-putting.

Despite all this, The Second Machine Age makes a worthwhile contribution to the wider discussion on technology, economics, and society. Brynjolfsson and McAfee’s nuanced discussion of the potential for both job displacement and job creation provides a comparatively thoughtful perspective that is often missing from more alarmist accounts of technological unemployment. Their focus on the importance of education and lifelong learning in preparing workers for the jobs of the future is commendable and a valuable contribution to the wider policy debate.

In concluding, The Second Machine Age is recommended to all readers who are interested in the profound technological changes reshaping our economy and society. While the book is not without its flaws, particularly in chapters where the tone may seem overly optimistic, it remains an important contribution to the discourse on technology and society. As we continue to grapple with the impacts of AI, robotics, and other advanced technologies, Brynjolfsson and McAfee provide a useful framework for understanding the challenges and opportunities that lie ahead.

‘The Second Machine Age: Work, Progress, and Prosperity in a Time of Brilliant Technologies’ by Erik Brynjolfsson and Andrew McAfee was published in 2014 by W.W. Norton & Co. (ISBN: 978-0-39-335064-7). 306pp.

Andrei E. Rogobete is Associate Director at the Centre for Enterprise, Markets & Ethics. For more information about Andrei please click here.