it's understandable to want such a commonly-shared standard, but that's not necessary (i'd even contend it's not desirable, for a robust and resiliant society).

we already codify ideas, test them, rank them, and modify or discard them through academic, religious, political, commercial, and social organizations. it's a dynamic system, not a (slowly-built) static one.

"The arc of the moral universe is long, but it bends toward justice". - MLK Jr. (paraphrasing theodore parker apparently, which i just learned =)