《天演论·导言十七·善群》说:“世治之最不幸,不在贤者之在下位而不能升,而在不贤者之在上位而无由降。”“不贤者之在上位”何以“无由降”呢?“门第、亲戚、援与、财贿、例故,与夫主治者之不明而自私,之数者皆其沮降之力也。”“譬诸重浊之物,傅(辅佐)以气脬(尿泡)木皮;又如不能游者,挟救生之环,此其所以为浮,而非其物之能溯洄凫没以自举而上也。”“使一日者,取所傅而去之、则本地亲下,必终归于其所。”那么, “Evolution and Ethics · Introduction 17 · Good Group” said: “The most unfortunate rule in the world is not in the lower part of the Sage and can not rise, but not in the superior without any reduction.” The superior “why” without “?” The first door, relatives, aid, bribery, the accident, and the husband of the unidentified and selfish, the number of their power of frustration also. “” The thing, Fu (adjuvant) to Qi (urinary bubble) veneer; and if not tourists, life-saving ring, it is floating, rather than its ability to trace the ups and downs did not bootstrap. “One day, take the Fu away, then the local parents, will eventually be attributed to.” Well,