Incest is legal in France since 1810 - and the new law from 2010 that seem to forbid it really doesn't. It's some additional protection law for minors.
As far as I can tell, it didn't lead to the entire French population growing an additional eye (and I doubt that incest rates are extraordinary in the first place), so the impact of lifting that ban probably isn't all that bad.
As far as I can tell, it didn't lead to the entire French population growing an additional eye (and I doubt that incest rates are extraordinary in the first place), so the impact of lifting that ban probably isn't all that bad.