You can now create and publish mods for Humankind.
There are more details in the announcement but to find mods go to
* Extras -> Community
* Connect your Steam account to mod.io
* Click "browse mods"
From there you can browse and subscribe to mods you want to
You can manage mods you have subscribe from in the "Mods" section by enabling/disabling specific mods you want to use.Creating And Publishing Mods
If you're a modder and want to get started on creating mods, there's a tutorial on how to start in the announcement above.
To get started you should see the mod tool for Humankind under
Tools->Humankind Mod Tools
Ensure you filter your library for "TOOLS" to see it.