Is Google the best thing that has happened for this world in 21st century?

I have few very simple questions:

1. Is the search & Ad business the most exciting business ever? Particularly more since it always encourages innovative thoughts, products, concepts, theories, rules and exciting ways to live your life.

2. Would there have been a Microsoft/ Apple today, if Google was born in the period of 1980's?

3. How different would the world have been, if there was no Google?

Common Army, I would to love see your thoughts on these.