Rank these inventions in terms of importance to humanity.
(Well, debatable about agriculture, slash'n'burn wasn't the only form of it, but it was common for land clearing at least... all we have now is one that involves combustion engines, though...)
Personally 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.
Romans 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.
What’s missing that make them more akin to orcas or wolves?
So who knows. Maybe if you gave them an extra 10k years, they would have achived "civilization". It is not much for the scale of human existance. But it is longer than any of our civilizations has existed for.
That is, if there’s a critical mass and population size.