Mundane astrology operates on the premise that the same planetary principles that describe individual psychology also describe collective dynamics — that Saturn's themes of structure, limitation and accountability apply as much to governments and institutions as to individual people, and that Pluto's themes of power, transformation and the exposure of what has been hidden apply equally to civilisations as to psyches.
The primary tools of mundane astrology are ingress charts (charts cast for the moment the Sun or planets enter a new sign, especially the Aries ingress marking the astrological new year), lunation charts (New and Full Moon charts), eclipse charts, planetary conjunction charts (especially the Jupiter-Saturn conjunction, historically called the Great Conjunction), and the natal charts of nations — charts cast for the founding moment of a country.
Nations, like individuals, have natal charts — and those charts respond to transits and progressions. The United States' Pluto Return — when transiting Pluto returned to its natal position for the first time since the founding in 1776 — completed in 2022–2023, a moment many mundane astrologers had been tracking for decades as a time of fundamental reckoning with the nation's foundational wounds and power structures. Whether or not one accepts the astrological framework, the timing is difficult to dismiss as merely coincidental.
The discipline requires both rigour and humility. Mundane predictions have a poor track record for specificity — astrology can identify the quality of a period (Pluto in Capricorn: the exposure and collapse of institutional structures) but cannot reliably predict which specific institution will collapse, when exactly, or in what form. The framework is most valuable as a lens for understanding why a historical period felt the way it did, rather than as a predictive engine for specific events.