If you’re creating a lot of great content. You should be sure that you include a ‘discuss this’ link which leads back to a recent discussion on the topic people can participate in.
It’s a simple means of promoting your community. If you’re really smart, you will include multiple opportunities throughout the content for people to agree/disagree/discuss in different places. Or, perhaps, a ‘add your opinion’ link works better. The text isn’t so important.
It’s simple to introduce and could gain you engaged members at great speed.