There's a great article on the history of social security here: https://en.wikipedia.org/wiki/History_of_Social_Security_in_...

It was not because family systems were failing. It came about in the era of the great depression, and the idea was rather unpopular at first, particularly among groups like farmers who had no interest in the new taxes that would come alongside it. Some of the arguments in favor of it were it being a way to get older individuals out of the work force in order to make room for younger workers. You have to keep in mind it was introduced at a time when unemployment rates were upwards of 20%. And retirement was and is absolutely possible. When people own their land and house and have basic maintenance skills, your overhead costs become extremely low.

Of course there's also no reason these things must be mutually exclusive. I think the ideal is to learn from the past, which proved its sustainability over millennia, and work to improve it. In modern times we've instead set out to completely replace it - or at least build up something from scratch, and what we've created just doesn't seem particularly sustainable.

You are 100% correct.

Pre-1960s, the elderly were living in SROs, often windowless, with family (without aid or care), in county poorhouses, or marked as senile and sent to a mental hospital.

Retirement and living with family was viable for many as long as they remained healthy. People imagine Norman Rockwell. Reality was very different.

I base my multigenerational dream on the documentary “Encanto”