I am trying to reserve value judgments on most of this as possible for the sake of this discussion, but if you view "oppression which stifles human development and growth" as a characteristic of evil, patriarchy surely has something to answer for. While I find sexual purity a high ideal, I find controlling others' sexuality to be a negative.
Trying to reserve value judgments?
I don't know how aware you are of what was said, but you have MADE value judgmentes. The OP used the term evil, so something HAD to form.
As for sexuality - I will go for controlling our own sexuality and calling a spade a spade. Let the expected whining begin if decadence doesn't like the verdict.
Answer for? Such finger wagging should prove their Utopia before denouncing those that labored before them. But meh - Petriarchy, Matriarchy, and the anti any -archy are just structures. Some folks like denouncing one or several. Nothing new in that department. Be that as it is, I do find the anti-structure ones are the least likely to have answers.
Is that any kin to the Luddite Lambada? The Masochism Tango? The Reformation Polka?
Funny - but no.
From what I read, you have hoisted the technology flag up to see if anyone is going to salute. But the argument is still young and imo weak.
Imo - technology or advancement in knowledge is like money. It is not good or bad, but increase in that sort with an absence of moral or ethical checks has historically proven far more 'evil' than abstinence or even regression.
I don't claim that a vow of technology abstinence is the way to go, but there are a few things to admire about simple living e.g. Quaker, Mennonite, Amish.
All these things are indicators of rapid socioeconomic change, and many of them are at levels far below historic highs (look at some murder statistics from the 18th century if you doubt me).
Oh yes, I do doubt picking one item and basing it on a selected era.

Could they be down because of an increase in laws, enforcement, organization of intel and practices or any other 'causation'?
If most socioeconomic changes are technology-driven, then we'd want to know how to use technology in the best possible way to destroy evil. The only agenda I have here is to get away from the idea that the only way to fight evil is to kill other people.
Then please define "evil".
btw - you have mentioned 'other evils' that don't fit the killing other people criteria. Just saying...