Yes parenting changes, as does everything else.
My upbringing in the 1950s and 60s was very modern for its time, as my parents explained why we had to do things, or were not allowed to do them, rather than telling us what to do.
We were only smacked once or twice that I can remember for very serious infractions of rules and for doing potentially dangerous things.
Sex was explained as and when we were old enough to ask about it. Death likewise.
However, we were expected to do as we were told, to eat what was put before us and to go to bed at a fixed bedtime - all things that horrify modern parents. We were out of nappies when we were two (Oh horror, says the modern mum)
We could sit still and be quiet when asked to, before we went to school and had learned to tie our own shoe-laces as preparation for that great event: Going to school.
Of course, I am old-fashioned - that is natural, as I will be 71 by the end of this month!