Jörn Spolander: The proposal for a Swedish Colosseum was born on a rainy morning in Rome

Take all this with a pinch of salt. But right then -- a rainy morning in Rome a few weeks ago -- the idea felt bellicose. Sweden could build a monument in the style of the Colosseum, which would be good both for the environment and for the economy of future generations. And it can be done completely without slaves.