1910s: Slaughtered in war
1920s: Rise of fascism
1930s: Ditto
1940s: Slaughtered in war fighting rise of fascism
1950s: Disease
1960s: Collapse of society, also nuclear war
1970s: Nuclear war, also collapse of society
1980s: Nuclear war
1990s: Not rich enough
2000s: Need that small electronic gadget
2010s: Excuse me, but I said skimmed milk for this latte