What is the theme in The Search by John Battelle?

Youthful idealism is the main theme. Page and Brin follow a small youthful vision when first building Google. Looking at the Internet as a mathematical graph with nodes and other components of the model leads to a different way of approaching search that yields better organic results than any of the other search engines can produce. Reaching for better organic search results drives Google's development, but at the price of not having a good business model that will bring revenue into the company. Youthful visions are often characterized by great ideas that lack the practical side of business, which is to make profit. The attempts of Page and Brin to keep Google from becoming like other mature companies show their youthful idealism.