Humans are funny animals, and behave in surprising ways. In an information space, a human’s needs are simple and his behavior straightforward. Find. Read. Save. But once you get a bunch of humans together, communicating and collaborating, sometimes you see the madness and sometimes the wisdom of crowds. This makes the architecture in social spaces the most challenging work you can take on. While your site can never control people, but it certainly can encourage good behavior and discourage bad. We'll cover core principals for creating robust and vibrant online communities, and illuminates critical design decisions that help a community thrive. Learn about the building blocks of social software, and which ones are most relevant to your business. Learn how to promote desired behaviors with interface design, and who’s doing it right. Learn when to apply familiar designs (such as with logging in or adding a friend) and when to strike out into entirely new territory.