Cleromancy is divination by the casting of lots, dice, knucklebones, marked stones or drawn sticks, where the fall of the objects is read as a verdict. This report item treats the lot as the oldest and plainest oracle, the practice sitting behind geomancy, the I Ching and the tarot, and sets out how chance was trusted to speak and how the outcomes were judged.

History

Casting lots to read a verdict from chance is one of the oldest and most widely attested divinatory methods, documented independently across many ancient cultures rather than tracing to one origin. Astragali, the knucklebones of sheep or goats, are attested across the ancient Mediterranean world both as game pieces and as oracular lots, their few stable resting positions read as a small closed set of possible answers. The Hebrew Bible describes the Urim and Thummim, a priestly lot-casting device of uncertain exact physical form, used to obtain a yes or no answer in matters of state and judgment, a well documented ancient Israelite instance of the same basic method.

Cleromancy sits historically behind several later, more elaborated systems this atlas catalogs separately: geomancy reduces its own random marks into sixteen named figures, described in full on this atlas's Geomancy report item page; the I Ching's coin or yarrow stalk method is itself a form of lot casting refined into a sixty four hexagram system, described on this atlas's I Ching page; and a shuffled tarot draw is, at its structural core, the same chance-selection principle applied to a much larger and more pictorially elaborate set of cards.

How A Reading Is Constructed

This report item sets out the plain method itself, casting a small set of objects and reading their fall as a verdict, and the traditional conventions for how that fall was judged, rather than casting a chart. It reads the bare cast on its own terms as the oldest layer of this family of practice, distinct from the more elaborate figure and hexagram systems geomancy and the I Ching later built on the same underlying principle.