I thought the whole purpose of manslaughter was that it does not require the intent to commit harm? Apparently, it's actually based on culpability. Involantary

I thought the whole purpose of manslaughter was that it does not require the intent to commit harm? Apparently, it's actually based on culpability. Involantary manslaughter matches my original ideal of there being no intent. But there's also voluntary manslaughter in which case intention is present but there's some other mitigating factor that reduces culpability.