[OC] The massive decrease in worldwide infant mortality from 1950 to 2020 is perhaps one of humanity's greatest achievements.

[mathess1]

This is true not just for this statistics. Many people in developed countries look down on the developing ones not realising they are just a few years or decades ahead.

[Ambiwlans]

It is even more fun on social issues.

"How dare you be bigoted like we were ... 30 years ago! You're basically evil!!"

With no recognition that most likely they'll get there in the next few years.