Please check out the following sentences.
(1) All the factories would shutdown and that would cause mas joblessness.
(2) The economics of national growth would be stagnant.
(3) Our technology would come to a standstill and wouldn't offer us convenience and comfort any more.
(4) Therefore, our lives would go backwards to the pristine stage.
Just my opinion... (sentence 4)
I'd write our way of living rather than lifestyles
Lifestyle(s) can mean many things and can be too specific (I have a very hectic lifestyle, My lifestyle is none of your business ect.), where as our way of living is generally used to talk about fundamental aspects of our society-technology, economy, in short what makes the way in which we live possible.
would return to rather than go backwards
Perhaps this is just a personal preference but it just sounds better, no?
Not a teacher.