1. Brahmacharya
2. Grihastha
3. Vanaprastha
4. Sannyasa
* I will forgo italicising these non-English words. Goodman gives the following in chronological order: celibate period, householder, retirement, renunciation. A website I consulted gives them as student stage, householder stage, hermit stage, wandering ascetic stage. Apart from the fourth, there is not a world of difference between the wording.
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