Question: Who was an early ethical egoist alternative to the philosophy also known as Ruism?
Sentence (from "Yang Zhu"): An early ethical egoist alternative to Mohist and Confucian thought, Yang Zhu's surviving ideas appear primarily in the Chinese texts "Huainanzi", "Lüshi Chunqiu", "Mengzi", and possibly the "Liezi" and "Zhuangzi".
Relevant evidence: Yes