1. it hasn't particularly increased the life-expectancy of people in first world countries.
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The end of large wars, the invention of antibiotics, the appearnce of social welfare and, interestingly enough, decolonization have all greatly increased the life expectation of first world countries. Medicine and quality nutrition was available to common folk, healthcare and monetary funds were a lot easier to claim and people didn't need to travel to far away countries were they died en masse on the way there, contracted deadly diseases and died fighting innocent people for their masters have helped the people a lot more than the industrial revolution
2. People had to live in indignified circumstances even before industrialization. Most of human population across human history had to live as slaves, had to live in serfdom or as plebians since the agricultural revolution and the first civilations. Whilst some of them had it rather well under certain feudal lords that were "generous", most of them weren't treated or considered as humans, but as property, capital and resources. That goes for all civilizations. Look at roman law and what they did to their slaves, most of them coming from "advanced" civilizations that were claimed from warfare. The british empire, one of the greatest enslavers in human history, have also enslaved and violated the Irish and even enslaved British people. For example, the narrative that Australia was a prison continent falls apart when you hear about how Brits that stole a single apple for their starving families during famines were sent there and were basically enslaved their entire lifes
3. Physical suffering has come for all due to the revolution. The first and the second world war, the holocaust, the countless deaths from being overworked, poisoned, all the children that were forced inside mines and were killed by machinery...
I am saying all this because, whilst it's unfair how some of us are doing much better than others simply due to being born in richer countries, we shouldn't antagonize each other and understand how we all have suffering and brutality in our histories. We shouldn't go on each others throat for it, we should unite against our masters, understand what happened to our ancestors and what they have done themselves and learn from it for a more peaceful and liberated future. I think I see things this way because my parents are immigrants from a rather poor country and found their way into a rather wealthy country. I've seen both sides and how similar these are in many ways
If the industrial revolution was a mistake or not, I don't know. I think it was inevitable and almost all technological advancements have costed human lifes. The mistake was in how these advancements were abused by people in power to fill their wallets and increase their power instead of them being used for the wellbeing of all. And in how oil companies and governments knew in the 80s about what happened/happens to our nature due to these techological advancements and not doing anything about it, despite having the ressources for it