40h is probably up from pre-industrial times.
Edit: There is some research covering work time estimates for different ages.
We could probably argue to the end of time about the qualitative quality of life between then and now. In general a metric of consumption and time spent gathering that consumption has gotten better over time.
What was all this free time spent doing in the pre-industrial era?
We could probably argue to the end of time about the qualitative quality of life between then and now. In general a metric of consumption and time spent gathering that consumption has gotten better over time.