Deal of the 20th century?

Did I promise there would be more blogging? Silly me.

My friend Vivike came over today, and among the various things we discussed during our Frisbee tossing expedition was the "deal of the century." The purchase of Alaska from Russia was perhaps the deal of the nineteenth century. But that was, like, so 151 years ago. It remains to be seen what the deal of the twenty-first century will be. But what, do you think, was the deal of the twentieth century?