@Jens_Rasmussen There are big genetic correlations between health, athleticism, intelligence, value system and many other traits.

Most every trait you can think of is heritable to a large degree. I could go into much more detail here if you'd like, but the value system of a people is definitely a heritable thing and there are obvious dysgenic filters in place that select against what we consider classic virtuous behavior.
For example: the destructive wars of the 20th century select against bravery. Brave people, those who like heroes, etc. volunteered more, died more. Cowards and those who think "hero worship is silly" would stay home more, not volunteer or be more likely to dodge the draft.
Another example are social safety nets, which select against the virtue of "not mooching off others". If you have that virtue, you'll not have children until you are self-reliant, because you think the safety net is only for those who "truly need it".
An amoral, or dumb, person will simply not care and have five kids on social security.

Let me know if this is convincing. I think we obviously hit a roadblock in the discussion if we don't agree what dysgenics even is