Fossil fuels are another feature like fire. One of the leading theories is that the availability of extremely energy dense fuels is one of the primary reason we were able to industrialize, and that without those fuels industrialization would be vastly more difficult if not impossible.
replyPersonally I disagree with 'impossible', but it would definitely be harder. There's a pretty good argument to be made for leaving significant quantities of fossil fuels in the ground for the next civilization. If we wipe ourselves out, whoever comes next is going to very badly need those fuels to rebuild an industrial base.
There were copper & bronze age industrial sites. Esp Tin & arsenic bronze smelting sites. Complete with child labour, open pit mines, assembly line style processing, and heavy metal poisoning. E.g. Semiyarka, in present day Kazakhstan, ~1600 BCE. You can still see the environmental damage to this day from the air.
replyRomans had industrial processes, too, for things like fabric / laundry cleaning.
What's new in the 18th/19th century is full-on mechanization of industry. And the wage labour system to make it possible. Accompanied by acts of enclosure etc to drive the peasantry off the land and into factories. Also the mechanization of agriculture that went with that.