Strangely enough, I was just compiling a list of "good things that happened this decade" in an adjoining window for a different purpose. Here's what I got so far:
Cheap solar energy
Electric cars
CRISPR gene editing
Real world machine learning applications
Commercial space vehicles
Ebola vaccine
Heightened public awareness of: plastics, climate change, inequality, sexual harrassment
We fixed the Ozone hole
Extreme poverty down by half
Higgs boson and gravitational waves discovered