Ranking was Google's 5% contribution to it. They stood on the shoulders of people who invented physical server and datacenter infrastructure, Unix/Linux, file systems, databases, error correction, distributed computing, the entire internet infrastructure, modern Ethernet, all kinds of stuff.
Everyone stood on the shoulders of file systems and databases, ethernet (and firewalls and netscreens, ...) Well, maybe a few stood on the shoulder of PHP.
Google did in fact pretty much figure out how to scale large number of servers (their racking, datacenters, clustering, global file systems etc) before most others did. I believe it was their ability to run the search engine cheap enough that enabled them to grow while largely retaining profitability early on.
Google was built on the shoulders of a lot of infrastructure tech developed by former search engine giants. Unfortunately the equity markets decided to devalue those giants instead of applaud them for their contributions to society.