Most traditions answer the question "how should I live?" with a single prescription. Sanātana Dharma answers it with a complete framework — showing that different things are appropriate at different stages of life, that different social positions carry different responsibilities, and that behind all of this is a cosmic order that human action either aligns with or violates.
How the four layers fit together
The four layers of the life framework — Ṛta/Dharma (cosmic), Varṇa (social), Āśrama (biographical), Puruṣārtha (motivational) — operate simultaneously and interdependently. The Puruṣārthas give the motivational vocabulary: what you are trying to achieve at any given moment falls under one of the four headings. The Āśramas give the biographical map: which Puruṣārthas are most appropriate at which stage of life. The Varṇa framework gives the social context: the specific Dharma (svadharma) of a person is partly determined by their function in society. And Ṛta-Dharma provides the cosmic foundation: the whole structure is not merely a human social invention but an expression of a cosmic order that makes social life possible at all.
The relationship between the Āśramas and the Puruṣārthas is particularly significant: the Brahmacarya (student) stage focuses primarily on Dharma — learning the tradition's ethical and ritual framework. The Gṛhastha (householder) stage integrates all four Puruṣārthas — Dharma (family duties), Artha (earning and maintaining prosperity), Kāma (legitimate pleasure including erotic love), and beginning to orient toward Mokṣa. The Vānaprastha (withdrawal) stage begins the shift away from Artha and Kāma toward Dharma and Mokṣa. The Sannyāsa (renunciation) stage focuses entirely on Mokṣa. Source: Olivelle, The Āśrama System (OUP, 1993).
The Dharmaśāstras — texts of the life framework
The primary textual sources for the life framework are the Dharmasūtras (the earliest Dharmaśāstra texts, approximately 6th–3rd centuries BCE) and the later Dharmaśāstras — most notably the Mānava Dharmaśāstra (Manu Smṛti, approximately 2nd century BCE – 3rd century CE). These texts set out the rules for each stage of life, each social function, the rites of passage that mark transitions between stages, and the general principles of righteous conduct. They are prescriptive, idealised, and addressed primarily to twice-born (upper-caste) men — their limited scope is a matter of explicit scholarly consensus. Source: Olivelle (trans.), Manu's Code of Law (OUP, 2005); Flood (1996), Ch.3.
Olivelle (trans.), Dharmasūtras (OUP, 1999); Manu's Code of Law (OUP, 2005); The Āśrama System (OUP, 1993). Flood (1996), Ch.3.
The Varṇāśrama-Dharma framework
The classical texts combine the Varṇa and Āśrama frameworks under the compound term Varṇāśrama-Dharma — the system of duties and conduct appropriate to one's social function (Varṇa) and stage of life (Āśrama). The Bhagavad Gīta's concept of svadharma (one's own Dharma, BG 3.35, 18.47) is understood in this context: the Dharma appropriate to a particular person is determined by their Varṇa and their Āśrama. This is not the same as the modern liberal concept of individual moral autonomy — the tradition understands one's Dharma as arising from one's position within a larger order, not from individual preference.
The tension between Varṇāśrama-Dharma (particularist — specific duties for specific positions) and Sādhāraṇa-Dharma (universal — duties that apply to all human beings regardless of position: non-violence, truth, non-stealing, purity, control of the senses) is one of the most persistent debates in classical Indian ethical theory. The Mahābhārata contains extended discussions of cases where these two levels of Dharma come into conflict — and the general answer given is that extraordinary circumstances may require departing from Varṇāśrama-Dharma but never from Sādhāraṇa-Dharma. Source: Hiltebeitel, Dharma (OUP, 2011); Olivelle (1999, 2005).
Olivelle (1993, 1999, 2005). Hiltebeitel (2011). Flood (1996), Ch.3. Zaehner (OUP, 1969), Ch.1.