The best proofs of the existence of the 54 year cycle are: 1) A 700 year record of British Wheat Prices measured against a 50 year moving average (1240-1940). 2) A 1400 year study of ice core temperatures subjected to a La Place transform showed the 55 year cycle as one of three cycles that stood out. 3) A 500 year study of European wars by Joshua Goldstein in his 1987 book Long Cycles. Notice how smooth and straight the 55 year average "red" trend is until the last three points when it begins to bend upward. This is what the Greenhouse Gases are doing to the planet especially in the last fifteen years (after 1990). Notice the relative peak in 1937-1942 points at almost the same level in the 1940 maximum. now look at the 1994 maximum. The 1992 point begins to curve down, but then the 1997 and 2002 point continue upward. The 1992-1997 points should be like the 1937-1942 points, but instead manmade global warming surges upward beyond the normal cycle curve. However, the Kondratiev Wave seems to be continuing normally in the economic and political dimensions with the strong 90's economy and the 2003 Iraq War.