Cross-pantheon comparisons

Nearly everyone who reads mythology eventually notices a resemblance and wants to know whether it means anything. These pages exist for that question, and their default answer is no more often than people expect.

Four reasons two gods can look alike

Sorting a resemblance into the right box is most of the work, and there are only four boxes.

1. Shared inheritance. Greek, Roman, Norse, Celtic and Sanskrit traditions descend from a common ancestral language and, with it, some common religious vocabulary. Where the names match by sound law — not merely the functions — the relationship is demonstrable rather than impressionistic.
2. Contact and borrowing. Cultures next door to each other trade gods along with everything else. The Mesopotamian and biblical flood accounts, the Greek and Near Eastern combat myths, the Roman adoption of Egyptian and Anatolian cults are all documented transfers rather than coincidences.
3. Ancient equation. Roman writers systematically identified foreign gods with their own. Those equations are historical facts about how Romans thought, and they are frequently poor descriptions of either god.
4. Convergence. Every society has weather, death, love and war, so every mythology has something to say about them. Two thunder gods holding weapons is not evidence of contact; it is evidence that thunder is loud.

The commonest error in popular comparative writing is treating case four as though it were case one, and building a universal-myth theory on it.

What a comparison page does

Each page takes a pairing people actually search for and runs it properly: what the sources say about each figure separately, where the equation holds, where it breaks, and — the part usually missing — what the cultures themselves thought about the comparison, since ancient writers made these identifications too and their reasons are recoverable.

Some pages compare two figures, like the sky-kings of Greece and Scandinavia, or Athena against the Roman goddess she was equated with. Others compare a theme across several traditions: underworlds, creation accounts, flood stories, thunder gods, mother goddesses, the guides who conduct the dead. The thematic pages are where the four categories above get tested hardest, because a theme with eight examples exposes which resemblances survive scrutiny.

The verdicts are not diplomatic

A comparison here can conclude that a widely-repeated equation is wrong. Ares and Mars, treated as identical in every school handbook, were not remotely the same to the people who worshipped them. Hel and Hades share a job title and almost nothing else. Some pairings that look far-fetched turn out to be defensible, and some that everyone assumes turn out to rest entirely on a Roman writer's convenience.

Where the honest answer is that the evidence does not settle it, the page says so rather than manufacturing a verdict. That happens most often with proposed Indo-European reconstructions, where a resemblance is real, an explanation is plausible, and proof is not available.

The comparative tradition, and its damage

Comparing mythologies is an old enterprise with a chequered record, and knowing its history helps. Nineteenth-century scholars built vast systems arguing that all myth was really about the sun, or about the seasons, or about vegetation dying and returning — Frazer's Golden Bough being the most influential — and those systems collapsed under evidence, but their conclusions are still repeated as fact in popular writing. The claim that a given god is a "dying and rising" deity almost always traces back to that literature rather than to a source text.

The twentieth century supplied a second layer: Jung's archetypes and Campbell's single hero-journey, which are genuinely useful as ways of thinking about story and are not evidence about what anyone believed. A comparison here may use them as vocabulary; it never uses them as proof.

Against that sits comparative linguistics, which is a real science with testable results, and where the Indo-European connections between several traditions on this site are established rather than asserted. Where a page relies on that, it names the sound correspondence rather than waving at a resemblance.

Where these fit against the rest of the site

A comparison page assumes you may know neither figure, so it gives what you need — but the deep treatment of each one lives on their own portrait page and in their tradition hub, and the comparison links out rather than duplicating them. Read a comparison to settle a question; read the portraits to understand a god.

If you arrived from a game, a novel or a film that mixes pantheons, these pages are probably the fastest route to what is real, because adaptations tend to flatten exactly the distinctions the comparisons are about.