单源论 Traditional form: 單源論 Pinyin (reading): dānyuánlùn Definitions: theory of single origin (of mankind) Characters: 单 - single, individual, only; lone 源 - spring; source, root, head; surname 论 - debate; discussion Traditional characters: 單 - single, individual, only; lone 源 - spring; source, root, head; surname 論 - debate; discussion