Can the One Piece world survive the Invincible War and Conquest?

All 18 variants begin attacking a bunch of different locations around the world, which ones can fend them off?

And once they do, they gotta fight Conquest, who arrives immediately after. Can anyone beat him?

Round 1: Golden age of pirates

Round 2: Pre Timeskip Great pirate era

Round 3: Post timeskip Great pirate era aka the current verse.