It might be worth pointing out that there is an existing slightly different 3 sector model (I was taught it in Economics classes way back decades ago) where the secondary sector is manufacturing and the tertiary sector is services (which includes financial services). This classification grew out of the three sector model of growth (see here for more info). The separation of manufacturing/services from financial services reminds me of Thorstein Veblen's concepts of 'business' and 'industry' from his Theory of Business Enterprise. Essentially, he saw the financial owners ('business') as constraining the ability of 'industry' (manufacturing and services) to serve society's needs because of the former's focus on extracting profits (even limiting production or closing plants if it were profitable). But unlike Marx, Veblen saw the engineers and not the workers as the ones who should be in control. The discussion of banking above is interesting as I've just been editing a translation of the chapters on money for volume 2 of Werner Sombart's Modern Capitalism (hoping to get it out in November - I started work on this volume in 2019 so I've made good progress, the first volume took 8 years!). It is quite a complex area even in terms of the history of money and monetary policy prior to the 19th century. Suffice to say that it can't be addressed in isolation from the history of extraction of natural resources.
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The separation of manufacturing/services from financial services reminds me of Thorstein Veblen's concepts of 'business' and 'industry' from his Theory of Business Enterprise. Essentially, he saw the financial owners ('business') as constraining the ability of 'industry' (manufacturing and services) to serve society's needs because of the former's focus on extracting profits (even limiting production or closing plants if it were profitable). But unlike Marx, Veblen saw the engineers and not the workers as the ones who should be in control.
The discussion of banking above is interesting as I've just been editing a translation of the chapters on money for volume 2 of Werner Sombart's Modern Capitalism (hoping to get it out in November - I started work on this volume in 2019 so I've made good progress, the first volume took 8 years!). It is quite a complex area even in terms of the history of money and monetary policy prior to the 19th century. Suffice to say that it can't be addressed in isolation from the history of extraction of natural resources.