Tanya Shah , US is only 230 plus years old. But their progress started soon after the 2nd world war. All this BS about 400 yrs is crap. THey did invent so many things. And they came up thru hard work and patriotism. NO COMMUNIST HERE. YOU NEVER EVER SEE AN A AMERICAN LABOR CARRYING COMMUNIST FLAG LIKE OUR INDIAN TRADE UNIONS. AFLCIO CARRIES US NATIONAL FLAG FIRST.