That was only for a short fraction of human history only lasting in the period between post-WW2 and before globalisation kicked into high gear, but people miss the fact that was only a short exception from the norm, basically a rounding error in terms of the length of human civilisation.
Now, society is reverting back to factory settings of human history, which has always been a feudalist type society of a small elite owning all the wealth and ruling the masses of people by wars, poverty, fear, propaganda and oppression. Now the mechanisms by which that feudalist society is achieved today are different than in the past, but the underlying human framework of greed and consolidation of wealth and power is the same as it was 2000+ years ago, except now the games suck and the bread is mouldy.
The wealth inequality we have today, as bad as it is now, is as best as it will ever be moving forward. It's only gonna get worse each passing day. And despite all the political talks and promises on "fixing" wealth inequality, housing, etc, there's nothing to fix here, since the financial system is working as designed, this is a feature not a bug.