Themistocles Did Not Only Buy Ships

The expansion of the Athenian fleet serves to think about how to connect strategy, capabilities, and preparation time.

Themistocles did not just buy ships

Series: What history already knew about talent · 6/6 · Workforce planning

In 483 or 482 BC, Athens had a stroke of luck. The silver mines of Laurion, south of Attica, yielded an unexpected surplus, and the proposal that was put on the table was the most natural in the world: to distribute it. Ten drachmas to each citizen, according to Herodotus.

One man opposed it. Themistocles convinced the assembly not to distribute the silver and to spend it on ships. Herodotus, in book seven, says that there were two hundred triremes and that the argument was the war with Aegina, the neighboring island, a close and credible enemy with which Athens had been in conflict for years. Other sources give a different figure: the Constitution of the Athenians and Plutarch speak of one hundred ships. It is not necessary to resolve the discussion here. What no source disputes is that Athens allocated an extraordinary resource to a very large expansion of its fleet, and that it did so thinking of a present need, Aegina, while Thucydides and Herodotus himself make it clear that behind it was the expectation of a much greater Persian attack.

Three years later, in the autumn of 480, that fleet was the core of the one that defeated Xerxes' armada at Salamis.

What the decision had in front of it

It is worth telling it with the correct proportions, because the heroic version often distorts them.

Athens was not a city foreign to the sea. After Marathon, in 489, Miltiades had sent an expedition of seventy ships, so there was already a naval tradition and people who knew how to row. What Themistocles' decision did was to multiply that capacity abruptly, in a short time, for a threat that most of the city preferred not to look at.

And a trireme is not a ship: it is a machine with about one hundred seventy rowers in three rows, who must row in sync and execute accelerations, turns, and reversals on command within seconds. Multiply that crew by two hundred ships and you get about thirty-four thousand rowers; by one hundred, about seventeen thousand. These are calculations, not censuses, and we do not know how many of those men were novices or how long it took them to be ready. But we do know that in Salamis Athens launched one hundred eighty triremes, according to Herodotus, and that they maneuvered well enough to defeat a larger fleet in a narrow strait.

Between the assembly's vote and the battle, someone had to turn silver into ships and citizens into crews. The sources do not describe how it was done. What they describe is that it was done in time.

The capacity that the ships needed

Here is where the documented story ends and my reading begins, and I want the separation to be clear.

The decision that the sources record is to invest in naval capacity anticipating a threat. The organizational reading I propose starts right after: building ships is not enough to have an operational fleet. It is also necessary to think about who will operate them and the time needed to prepare them. A hull without trained crew does not win battles; a strategy without the capabilities to execute it does not win markets.

That is workforce planning. And it is what almost no organization does.

How we plan

Most companies have a strategic plan. For twelve, twenty-four, or thirty-six months, with fairly clear objectives: enter a market, launch a line, digitalize an operation, integrate an acquisition.

What it almost never has is the translation of that plan into capabilities. The plan says 'we are going to do this'; it does not say 'and to do this we need so many people who know how to do that at this level, we have so many, and we will cover the difference this way.' The strategy is written in one place and the capabilities are stored in another, and no one contrasts one with the other with evidence.

So the workforce is planned by headcount and budget, and the capabilities are discovered when they are lacking. The project is launched, the team does not arrive, an urgent vacancy opens, the vacancy takes months, the plan is delayed. It is voting for the ships the same summer that Xerxes is already crossing the Hellespont.

And there is a second, quieter loss. Since we do not know what capabilities we have, we also do not know who supports the organization. In every company, there are people on whom everything else relies, and who have been there for years without a replacement because no one has looked at who could substitute them. When they leave or become exhausted, what they knew is discovered.

An example with today's data

This quarter we analyzed about five hundred thousand active job offers to understand the demand for profiles and capabilities in the healthcare sector. We curated a universe of 176 strictly healthcare profiles, with more than 186,000 active jobs, and looked at what was growing and where. With the usual caution: it is a sample of offers, with the limitations that entails, and an increase in demand does not by itself demonstrate its cause.

With that caution, the pattern is clear. All 81 profiles for which we had time series were growing in the ninety-day window. The volume is in direct care, not in high specialization. The acceleration is in rehabilitation: five of the ten profiles that are growing the most are in physiotherapy, occupational therapy, and podiatry. And of the hundred most demanded capabilities, ninety are transversal to care.

For those who manage people in a hospital group, a network of residences, or a health insurer, that report is the silver of Laurion: it indicates where demand seems to be heading, towards proximity, chronicity, and rehabilitation, and what capabilities it requires. What it cannot tell you is how many rowers you already have. Only by measuring your workforce against those capabilities does one know that. And when one does, they have the two halves: what the future will demand and what exists today. The distance between the two is their staffing plan, and the decision for each segment is the same as always: train, move, or hire, and when.

A map that updates

There is one last thing. Athens did not stop rowing after Salamis. The fleet became the center of its power for the following century, along with the continuous training of its crews. What had been built for a crisis was maintained as a system.

Many organizations have at some point created a capabilities map. Almost all did it as a project: a consultancy, a few months, a document. And the document aged before the year ended because the strategy changed, people changed, and no one updated it. A capabilities map that is not measured again is last year's fleet.

At The Wise Skill, we build exactly that: connecting what the business will demand with what people know and can do, based on an evaluated capabilities map, not deduced, and updated periodically. It is the synthesis of this series: Croesus and the test that must measure what the decision requires, the tribunes of Polybius and the position that defines the criterion, Qin and the rise that is neither inherited nor deduced from the results in the previous position, the Egyptian tablet and the red ink, Aristotle and the tasks that change before the positions. Each was a decision. Themistocles is the plan that organizes them.

And the question, as in all previous installments, can be asked tomorrow, the next time the strategic plan is discussed.

When does Xerxes arrive, and how many of our people know how to row?

If you have a plan for twelve or twenty-four months, a new business, a digitalization, an integration, and it needs to be translated to people, message me directly and we can look at it with your profiles. And if you want the complete report on the healthcare sector, ask me for it there too.

End of the series. Thank you for reading this far.

Sources. Herodotus, Histories, VII, 144 (the silver of Laurion, the two hundred ships and the argument of Aegina), VI, 132 (the seventy ships of Miltiades) and VIII, 44 (the one hundred eighty Athenian ships at Salamis). Thucydides, I, 14, links shipbuilding with Aegina and the expectation of the Persian attack. The Constitution of the Athenians, 22, 7, and Plutarch, Themistocles, 4, and one hundred triremes instead of two hundred. The crew of about 170 rowers per trireme is the usual reference figure; the total number of rowers is an estimate, not data from the sources. Before Salamis, the Persian army had arrived by land and occupied Athens; the battle was a Persian naval defeat. Health data: The Wise Skill, Research Report Q3 2026.