Why are international college rankings drastically different from the Usnews rankings?

<p>For fun I compiled the various rankings of the USNWR Top 30 research universities. The last column is their new ranking based on the average (among this list of schools).</p>

<p>School USNWR ARWU QS THES Ave NR
Harvard 2 1 2 2 1.75 1
Stanford 5 2 3 4 3.5 2
MIT 7 4 1 5 4.25 3
Princeton 1 7 10 6 6 4
CalTech 10 6 10 1 6.75 5
Chicago 5 9 9 9 8 6
Yale 3 11 8 11 8.25 7
Columbia 4 8 14 13 9.75 8
Penn 7 15 13 16 12.75 9
UC Berkeley 20 3 25 8 14 10
Johns Hopkins 12 17 16 15 15 11
Cornell 16 13 15 19 15.75 12
Duke 7 31 23 17 19.5 13
UCLA 23 12 40 12 21.75 14
Michigan 28 23 22 18 22.75 15
Nortwestern 12 30 29 22 23.25 16
Brown 14 42 47 52 38.75 17
Carnegie Mellon 23 52 57 24 39 18
WUSTL 14 32 86 42 43.5 19
UNC CH 30 43 54 47 43.5 19
USC 23 47 125 70 66.25 21
Rice 18 92 136 65 77.75 22
Vanderbilt 17 49 181 88 83.75 23
Emory 20 101 141 80 85.5 24
UVA 23 101 132 112 92 25
Dartmouth 10 151 119 126 101.5 26
Tufts 28 101 204 80 103.25 27
Notre Dame 18 201 224 90 133.25 28
Georgetown 20 301 189 160 167.5 29
Wake Forest 23 301 329 180 208.25 30</p>