lot about, you know, the problem of enfeebled people, basically weighing the the capacities of the popun general. so you know, it helps us understand what ' l end of a los you know it's over a century of decline and i think that's want to push a little bit on something you pointed out by using the a different word which is expertise and you wrote a about american■1s know well that in the progressive era there was a lot of move to the idea of that you do research and you present basis policy. supreme justice was inging, quote, scientific eurt to affect decis. a lot of that was fine, good. although i have to say. well, lexamples from my work thd me to some suspicion about. for example in the early 20th century, hardrock mininwest begy were becoming ill with what today is called public airey thromb. not their word then the mine■@ managers believe that thy became ill because had poor hygiene at home and they organized ways of trying to educate people, particularly the wives of miners, about the way to raise children. and to do this and thatminers kt the case thehat was making them sick.