[Newworlds]

The only way to have good roleplay (whether encouraged or otherwise) is to have a rich, quality, inspiring history and background to your game and allow that as part of the creation of your players or part of their growth in the game.

For example, to encourage roleplay you have quests or histories or requirements that reward players that show roleplay. You and your game are the example. If you and your game show it, others may follow that style and lead.

Good Luck!