I believe it is because we are hooked up to the Creator. Just look at Moslem or Buddist or Hindu and pagan god societies. Have they contributed anything comparable in inventions to humanity? By gosh, you're right. Thomas Edison, Henry Ford, and Albert Einstein were all devout Christians.
Angelo, you miss the point. This country is founded on Christianity. The majority of our founding fathers were christians and were keenly aware that for this nation to succeed, God was to be invited to be our "King". Because of this, God has blessed this nation, believer and non believer alike. Remember, God loves all people, but only sheds His blessings where He is invited. America, like Israel or Afghanistan or Japan, is a people... a nation. Our nation started out as inviting Jesus Christ to be our Lord. Hence, "God shed His grace on thee". One need not be born-again to enjoy God's rainstorm of blessings, just be sure to been under the rain cloud. People of the world recognise we are blessed and risk life and limb to be under that "cloud".
Remember when King David of Israel brought the ark of God's presence back to Jerusalem, The Bible says that during the time that God's Presence was there and being celebrated and praised, that there was no war, no poverty, no sickness, and even the non-Hebrew people were blessed because of it. It is the same way here in America. Maybe, you are'nt a christian, but it is because Jesus is Lord over America that you enjoy this countries God given blessings and creativity.