messages on your phone, your's text books, note books, diary, any written messages on any packages for information and guidance, doctor's prescription, teacher's comments and marking of your test papers , road signs and information along road sides for guidance, all are possible due to invention of writing.
For invention of wheels:
all vehicles are able to run due to invention of wheels
Significance of the Paleolithic era was that it took up up the majority of our human history about 96% and although not much happened in that time, without the Paleolithic era, there would be no foundation for modern life.
