Stability defines - Can both be added as the negative effect (sub-50% stability) or positive effect (pro-50% stability).Laws - Works the same as ideas, and can have the same modifiers.Advisors - Works the same as ideas, and can have the same modifiers.Events - If the event gives an idea with modifiers in it, or unlocks hidden research.
Modifiers can be gained through every static or dynamic token that persists over time: Modifiers are not a one-time use command and need something to apply them. Everything from research speed to army organisation can be changed. A modifier is something that can affect your nation in many different ways.
