Apart from terrorism, I don't think much has got worse in the World over the last century. Most things have actually improved. The standard of living of most countries is higher now than a 100 years ago, nutrition is improving per capita, agricultural yields are higher than ever, life expectancy is improving around the globe .....the list of improvements is almost endless.
The difference is that individuals and small groups of radical minorities now have the means and the willpower to hold the majority to ransom in a manner that in the past was largely reserved for countries. They are not necessarily poor (all of the recent terrorists were middle class) and they are not necessarily suffering (of course some are but this is not a prerequisite to terrorism).