Lachesis

The verb behind Lachesis, lanchano, means to obtain something as one's lot, and its noun, lachos, is the share that falls to a person when a set of shares is distributed. Greeks used the word for concrete things first: land divided among settlers, spoils divided after a raid, priesthoods and offices assigned by drawing tokens from a jar. Allotment of that kind was not thought of as random. It was a recognised and public way of settling who received what, and it removed the decision from human favouritism without handing it to nothing at all.

Lachesis is that procedure as a goddess. Where Clotho makes the thread and Atropos ends it, Lachesis fixes how much of it there is. That places her at the centre of the sequence in more than order: the length of a life is the part of the arrangement that a Greek audience found genuinely interesting, because it is the part that visibly differs from person to person and that no one can account for.

Her iconography follows the function rather than a story. Ancient art gives her a rod or a measure, sometimes a globe or a scroll, and she is shown reading or marking rather than working with her hands. The Roman name Decima, the tenth, ties the group to the months of a pregnancy counted inclusively, so that the middle sister again holds the span rather than its beginning or its end.

Plato puts Lachesis at the hinge of the most consequential passage any Greek writer devoted to the Fates. At the close of the Republic, Er reports what he saw in the world of the dead: souls due to be reborn are led before Lachesis, an official casts lots among them to fix the order in which they will choose, and a great array of possible lives is spread on the ground. A herald announces that the responsibility belongs to the chooser and that god is not to blame. Each soul then takes a life, and the order in which it chose determines only how wide the remaining range was, not which life within it.

The adjustment to older Greek assumptions is considerable and Plato makes it deliberately. Lot still governs the sequence, so something outside the person is still at work, but the content of the life is picked by the soul itself, on the basis of the understanding it has brought with it from its previous existence. A soul that lived decently by habit and without reflection is shown grabbing the first splendid tyranny it sees and discovering the horrors packed inside it. Lachesis then gives each soul the guardian spirit that will see the choice carried out, and the thread is confirmed by Clotho and made irreversible by Atropos.

Two things survive that redescription. Allotment remains genuinely binding, and the length of a life remains fixed at the outset by something the person does not control. What changes is where the moral weight sits, and later readers, philosophical and Christian alike, returned to this passage precisely because it lets fate and responsibility occupy the same account without one dissolving the other.