[ValerieUSA]

When did incest first become taboo?

[medved]

Probably long ago. Mongols were always exogenous and it appears even barbarous peoples knew that inbreeding was a problematical idea. Hard to even picture democrats doing it...

[freebilly]

When did incest first become taboo?

You asking about the world in general or just in West Virginia?

[madison10]

Don't know for sure, but when Lot's daughters got their father drunk & seduced him, the Bible speaks as if it is wrong. That was in Genesis.

if you're speaking of other cultures...I don't know)