Question

How did this world come about ? why are our conditions of life so different from those of our parents and grandparents?

Answer 1

because first the earth was just a dust particle after some million years it had form to the earth and conditions of life is different from those of parents and grandparents because of pollution
I hope it will help you

Answer 2

Due to our life conditions which we used to live among technology which makes us different from our ancestors.