The received Mozi is a multilayered compilation of anonymous material from roughly the fifth to third centuries BCE, not a finished book securely attributable to Mozi alone.
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This is an evidence-linked editorial paraphrase, not a direct quotation.
Mozi
Transmitted Mohist corpus; Chinese Text Project · Classical Chinese text with James Legge historical English translation
Locator: Chapter structure
Open sourceMohism
Stanford Encyclopedia of Philosophy
Locator: Section 1
Open source