One of the images I added, and one that I am particularly proud of, showcases the 'Maximum School Strikers per Country.'
 
<1000
 
1000-10.000
 
10.000-100.000
 
100.000-1.000.000
 
1.000.000+
Another important image I made:Countries autocratizing (red) or democratizing (blue) substantially and significantly (2010–2020)

Mostly active on the Dutch (nl:Gebruiker:PJ Geest) and English wikipedia (en:User:PJ Geest).

Impact of some of the sources of images I partly added to Commons or integrated in different Wikipedia articles:

Other image sources: