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In page Eschatology:

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The Buddha described his teachings disappearing five thousand years from when he preached them,[1] corresponding approximately to the year 4300 since he was born in 623 BCE.[2] At this time, knowledge of dharma will be lost as well. The last of his relics will be gathered in Bodh Gaya and cremated.[citation needed] There will be a new era in which the next Buddha Maitreya will appear, but it will be preceded by the degeneration of human society. This will be a period of greed, lust, poverty, ill will, violence, murder, impiety, physical weakness, sexual depravity and societal collapse, and even the Buddha himself will be forgotten.[3]