Admiral Yamamoto himself said he feared he had "awakened a sleeping giant" after the bombing. Many historians agree that this was a poor decision because America would have probably taken much longer to enter the war had Pearl Harbor not been bombed.
The answer is information gaps. These are missing
information necessary to complete a job. The United States give out with fears
in the 1990s about a gap between "information haves" and
"information have-nots" by ratification of a new act that endowed the
connection of every insttution and archive to the Internet.