2012 Men's Marathon: Gold - Stephen Kiprotich (Uganda); Silver - Abel Kirui (Kenya); Bronze - Wilson Kiprotich (Kenya)
2008 Men's Marathon: Gold - Samuel Wanjiru (Kenya); Silver - Jaouad Gharib (Morocco); Tsegay Kebede (Ethiopia)
2004 Men's Marathon: Gold - Stefano Baldidni (Italy); Silver - Mebrahtom Keflezighi (USA); Vanderlei de Lima (Brazil)
2000 Men's Marathon: Gold - Gezahegne Abera (Ethiopia); Erick Wainaina (Kenya); Tesfaye Tola (Ethiopia)
1996 Men's Marathon: Gold - Josia Thugwane (South Africa); Lee Bong-Ju (South Korea); Bronze - Erick Wainaina (Kenya)
If you think that looks anything like what women's hockey has, or says that the sport has been dominated by athletes from one or two countries, you're lying to yourself. If you dig in a little deeper and look at the times what you find is that most of them have been pretty close races.
If women's hockey fans are determined to feel like the world just has it in for them I suppose I can't stop you but no one is going to be impressed by the pity party. If you want it in the Olympics, then the national sports federations are going to have to step up to keep it there.