The Boston metropolitan area is one of the most densely populated regions of America; however, it is also an area that provides relatively easy access to open spaces. In the past, Massachusetts has taken a leading role in movements to preserve open space. Founding families brought ideas of common lands with them in the 17th century and later generations were willing to dream of massive and forward-thinking projects like the first landscaped cemetery, the first public beach, the Emerald Necklace, state forests, and protected harbor islands. In light of increased population density and a significant potential for environmental disruption due to climate change in the coming years, it is important to look back at the pioneering role Massachusetts has taken in the preservation of common lands and to think about the leadership we can offer for the future.