No one person can be attributed to inventing the ARPANET, which was a US Department of Defense project. Vince Serf, who is called the father of the Internet, was on the ARPANET project as a graduate student at UCLA. Here's are useful links:
http://www.livinginternet.com/i/ii_arpanet.htm
http://en.wikipedia.org/wiki/ARPANET#Background_of_ARPANET
Uppero33
The ARPANET (Advanced Research Projects Agency Network) developed by ARPA of the United States Department of Defense during the Cold War, was the world's first operational packet switching network, and the predecessor of the global Internet.
...I suppose you are making a small joke. Al Gore was on a committee that approve funding. Don't forget that ARPA is a US government military agency.
...Lawrence Roberts is credited with founding the ARPAnet.
http://news.zdnet.co.uk/internet/0,1000000097,39288447,00.htm
Correction !
In my post above it should read "Vint Cerf, who is called the father of the Internet ...".