Jainism has evolved mainly through historical developments in texts, monastic orders, and reform movements, while keeping core beliefs like ahimsa, anekantavada, and the path of the Three Jewels intact.

• Early beginnings and scriptures

- The tradition holds that Tirthankaras and their teachings formed the core path. Over time, different communities accepted varying canons and commentaries, which shaped practice and scholarship. Digambaras claim the original Agamas were preserved in their line, while Śvetāmbaras preserved a broader set of scriptures. This difference in canonical trust is a key axis of evolution between the two main sects. You can read more about how these divisions developed.

• Great split into Digambara and Śvetāmbara

- Around the early centuries CE, debates about texts, monastic rules, and practices led to a formal division into two main communities: Digambara (sky-clad monks; emphasis on extreme renunciation) and Śvetāmbara (clothed monks and nuns; emphasis on temple worship and a larger corpus of scriptures). This division also influenced views on women’s path to liberation. You can read a concise overview here. - The two traditions then continued to develop their own sub-sects and leaders, with different approaches to monastic life, rites, and scripture. For example, Śvetāmbara sub-sects grew around temple-based worship (Murtipujaka), non-idolatrous groups (Sthanakvāsī), and reform-lineages like Terapanth.

• Sub-sects and reform movements within Śvetāmbara and Digambara

- Śvetāmbara: major sub-sects include Murtipujaka (Deravasi), Sthanakvāsī, and Terapanth. Each has distinct practices around idol worship, temples, and leadership. - Digambara: over time, reform movements and sub-traditions arose (e.g., Terapanth, Bisapanthi, Taranpanth), often centered on centralized leadership and variations in temple rites and image worship.

• Notable reform and growth periods

- 17th–18th centuries: reform movements within Śvetāmbara (notably Sthanakvāsi and Terāpanthī) emphasized non-idolatry, stricter discipline, and more centralized leadership in some lines. These reforms shaped Jain practice in many regions and carried into modern Jain communities. - 18th–19th centuries and beyond: later lineages and institutions continued to adapt Jain practice to local cultures, diasporic communities, and temple networks, while preserving key Jain doctrines. For a compact overview of sects and sub-sects, see the detailed explanations here.

• Modern spread and everyday practice

- In the modern era, Jain communities have expanded beyond India, enriching Jain libraries, temples, and social service organizations. Across these communities, core principles remain: non-violence to all beings, non-attachment, and a multi-faceted view of truth (anekantavada), even as temple rites, monastic codes, and canonical canons differ by tradition and sub-sect. For contrasts between main sects and their practices, you can read a concise comparison.

If you’d like, I can focus on a particular aspect of Jain evolution (for example, how the monastic codes changed over time, or how specific sub-sects differ in temple practice) with simple, point-by-point explanations.