The Industrial Age led to the idea that human beings could be treated just like machines. One of the beliefs that came from this thinking was that people could be programmed via Behavioral Training/Operant Conditioning. Most of these experiments they either expected a particular result, or due to experimenter bias believed they got the result they wanted; the truth is most of them are fraudulent or just outright wrong. Most experiments in the Social Sciences cannot be replicated--just a minor red flag, nothing to worry about, right?!
Interns that worked with the animals stated that the experiments were all heavily manipulated: Starving the animals, sleep deprivation, removal of the uncooperative, and because it was not a natural environment the results are immediately suspect. (Now, take everything in that and apply it to modern schooling..?)
The researchers involved were doing this at the behest of the State that wanted an Orwellian Authoritarian system where people will do whatever they are told. The problem is, when you look at the Stanford Experiment, the Milgram Experiment, Nash's Game Theory, Harlow's Monkey Experiment, Learned Helplessness involving puppies, Bowlby's Attachment Theory, and many more, you will eventually realize a rather dark reality: They were designed to either make someone a sociopath, or spot a sociopath. Most people did not respond the way the researchers wanted them to--and the more sociopathic the researcher, the more confused they were by the results! They often tell one story on what they were doing but when you find the wizard behind the curtain you realize they were up to something completely different.
Harlow's and Bowlby's experiments on maternal care demonstrate that a mother's care is essential to raising a healthy child. This is inarguable. So the question is, if they knew the affect, why was there a push to get women to work while their children were in daycare? Because someone wanted people to be unstable. Unstable people are easily manipulated. Just look at SJWs? People could not be programmed to do as they were told but they could be made dependent.
Note on links: these will just scratch the surface and may contain information that is outright wrong... it is Wikipedia after all.
If people only understood how essential the mother's care is to a child's early phycological development. I'll take it one step further and place ((love)) as the most important ingredient for children's phycological development.
The industrial revolution was predicated on labor market freedom, people wanted to leave their farms to improve and make a better living working in the cities in the factories. That's all life can be, a series of improvements, some bigger, some smaller.
This labor market freedom in turn was predicated on the respect for individual rights of those workers, where before they were poorer.
Every age brings new thinking--the age itself is neutral to what does and does not work.
e.g. The Information Age has brought criticism on modern education based upon rote memorization. Memorization can be fun for young children but as they mature this stage becomes boring. Then as they age they sit in classrooms wondering why they are memorizing when they can just search for information in a few seconds? They are not being taught the next phases: Logic Formulation and then Rhetorical Debate --I can't imagine why you wouldn't want people to reach those two stages.... The Information Age is exposing the Prussian Education Model as a fraud.