Found a movement

Give it a name and a character. It becomes an ordinary ideology: nations can adopt it, spread it, and go to war over it.
Trust in the state 0.05
Cost of order 1.00
Expansion 1.00
War effort 1.00
Piety 0.40
Tolerance 0.60
Tie it to a religion and its nations convert to that faith over time.
Conviction 0.50
Leave empty and they keep ordinary names. Add a form and every nation of this ideology is named with it — Nera becomes The Communist States of Nera.
Draw one. Nations of this ideology stamp it on their flag instead of the usual charge. Leave it blank and they keep ordinary emblems.
70%
Tick none and its nations use any colours. Tick some and every flag of this ideology is built from those alone.
Tick any charge this ideology will never allow on a flag.

Found a religion

A made faith is not just a name. What it holds sacred bends how its nations grow, fight and earn.
Reveres the sea 0.00
Holy war 1.00
Industrious 1.00
Frugal 1.00
Devotion 0.50
Its nations expand into these far more cheaply.

Generate a world

Height, temperature and rainfall are generated separately, then the biome is read off temperature against rainfall — so the belts come out where you would expect them.
Sea level 50%
Landmasses 3
Mountains 0.50
Temperature 0.50
Rainfall 0.50
Inland water 0.35
lobby ------
Nations
God mode tool brush 1 nation detail 6
tick 0 · 0 nations
Click anywhere on land to found a capital, or hit Seed 40. Each nation takes its 80 travel points from the terrain around it, then spreads by cheapest path. Scroll to zoom, drag with right mouse or space to pan. Tap land to found a capital, or hit Seed 40. Drag to pan, pinch to zoom, tap a nation to inspect it.