> steel, heavy industry, semiconductors, machine tools

the question is if single country can carry all these industries at loss for prolonged period of time.

Another approach is to rely on international supply chain and speed of innovation, we can't produce steel domestically profitably today, fine, we may buy it from diversified international supplier network, and rebuild it fast tomorrow if needed using new tech, and focus on many other high margin verticals, instead of putting many billions of resources into infra which could be obsolete tomorrow.

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xyzzy123 3 hours ago | parent [-]

This is fine as long as the supply chain is, in fact, diversified.

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riku_iki 3 hours ago | parent [-]

sure, looks like more analysis is needed to check which verticals are diversified and which are not, instead of throwing blanket list of everything.

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xyzzy123 3 hours ago | parent [-]

Agree, worth analysing what is genuinely commodity.

There are more elements to it though which can be sort of hard to explain.

There are whole cultures and ways of thinking built around production. The children of engineers who worked on xyz v1.0 have a genuine advantage when its time to work on xyz v2.0. There is a lot of tacit knowledge in these engineering fields and you have a huge advantage in knowledge retention if you can maintain unbroken chains of succession.

You can't achieve the top levels of ability (decades of experience, generational knowledge) if you are whip-sawing production to and fro across the globe every 10 years.

There are also cross pollination effects. Being in the same community with as many related fields as possible (co-located) is what drives cross-pollination and mobility of ideas and people between industries.

Think how many countries have tried to copy "silicon valley" and failed, and _why_ they failed.

What I'm saying is that technology is built by _people_ and there are human reasons why having local capacity is beneficial for all the related industries in the area.

	▲	riku_iki 2 hours ago \| parent [-]
		> The children of engineers who worked on xyz v1.0 have a genuine advantage when its time to work on xyz v2.0. my point is that other children with no extremely heavy investments into perl v1.0, will have some skills in c++ v1.0 and python v1.0, and will have advantage in adapting Tensorflow v1.0, which is more valuable than skills in perl v2.0. Heavily investing in one industry you sacrifice some flexibility. So, this is multifactor analysis, lets say wise American people will elect me as next president, I would create list of industries, assign metrics (national security importance, potential revenue in 5y from now, impact on other industries, potential margin, risks of failure, etc), then build some formula which aggregate those metrics into single, and base on final metric allocate weighted funds to support N top industries.