[b112]

While the lead theory may indeed be true, one other thing has changed in almost all areas of the world.

Birth rates.

And with declining birth rates, comes a decline in the number of youth, meaning "more of the population" is of an older age. Men are typically at their most aggressive when young adults, and those which have started families, have a different perspective on life.

Note: not saying the above is the cause, but I do believe it to be a valid theory.

edit: it is also plausible that multiple things cause one effect.

[watwut]

Young people are less violent, less likely to get pregnant as teens, drink less and take less illegal drugs then they use to - all per capita.

[mschuster91]

> less likely to get pregnant as teens

That's caused by providing at least somewhat decent sexual education in schools, although the US is still lacking in mandating sex ed or mandating medically accurate sex ed (=banning "abstinence only").

[jeofken]

Are you sure? It could just as well be because of the internet catching our attention so boys and girls don’t spend it on each other like they used to. No evidence for either claim although both sound plausible

[watwut]

Teen pregnancy is heavily studied, it is big social issue. It has pretty large impact on mother, child, father and extended family. The articles I have seen strongly associated sexual education with both less sex and safer teenage sex.

Basically, if you teach kids about sex and anticonception and condoms, they are less likely to do it and more likely to use this condoms and generally behave more safely.

On the other hand, abstinence only education is associated with more pregnancies.

[jeofken]

That parenthood out of wedlock is a tragedy is true, but how can you or said articles authors be sure the link between teens today not having them being because of sex ed in school? I’m not saying it’s unlikely, but I’m wondering if there is any evidence showing the correlation, or if the effect is due to any other reason?

[morpheos137]

Maybe this has something to do with it?

https://uk.reuters.com/article/health-testosterone-levels-dc...