Under “Ravage Timing” on p. 7 of the Jagged Earth rulebook, it mentions “modifiers to individual Invader Damage” happen first, and “per-land modifiers” only happen afterwards. Why is this relevant? What are some examples of individual vs. land modifiers?

Under “Ravage Timing” on p. 7 of the Jagged Earth rulebook, it mentions “modifiers to individual Invader Damage” happen first, and “per-land modifiers” only happen afterwards. Why is this relevant? What are some examples of individual vs. land modifiers?

It's relevant when every Invader in a land has been rendered harmless (via Strife, or reducing its individual Damage to 0) — drawing an Event Card like Destroy the Unnatural (which does +3 total Damage in certain lands) won't increase the Damage from 0 to 3.
Individual modifiers are things like “Cities deal +3 Damage”, Mesmerized Tranquility (“Each Invader deals -1 damage”), or Strife tokens. Per-land modifiers are things like Destroy the Unnatural (above), or anything which says “Invaders deal +N Damage (per land) …”