Times when the 21st century mirrored the 20th century

I can't think of too many other examples besides the ones that have already been mentioned. History does tend to repeat itself though, and I wouldn't be surprised if this decade does pan out to be similar to the 1930s, like @bchris02 mentioned. Actually, it's scary thinking about it like that, because the Chinese Communist Party's quest for world dominance and its suppression of the freedoms of Tibetans and Hong Kongese, is somewhat similar to the Nazi's rise in power during the '30s...and we all know what happened from then on.