Well, the Web was certainly a key invention, but hardly the only critical invention.
Jon Postel, Vint Cerf, and countless others working on the ARPANET (some for ARPA and some separate from it) in the 60's and 70's probably had a much bigger impact. Let's face it - who today uses any networking technology other than TCP/IP? Look at what became of
ARCNET,
Novell NetWare,
AppleTalk and
NetBIOS? Every network technology other than IP is either dead or has been re-engineered to work as an application over IP. I think that's quite an incredible fact to realize.
And then let's not forget all the groundbreaking UI research at SRI and Xerox which led directly to the development of all modern GUI systems, Mac, Windows, OS/2, X11 and many others.
There were tons of critical inventions over the decades that led to the computing world we have today. I think that's the point of Isaacson's book.
Unfortunately, a very low percentage of
Americans are interested in this (compared to people from China, Japan and India, who are very keen to learn technology.).