Specific genres of social media may come and go, but these underlying properties are here to stay. We won’t turn the clock back on these. Social network sites may end up being a fad from the first decade of the 21st century, but new forms of technology will continue to leverage social network as we go forward. If we get away from thinking about the specific technologies and focus on the properties and dynamics, we can see how change is unfolding before our eyes. One of the key challenges is learning how to adapt to an environment in which these properties and dynamics play a key role. This is a systems problem. We are all implicated in it - as developers and policy makers, as parents and friends, as individuals and as citizens. Social media is here to stay. Now we just have to evolve with it.