This stage is characterized by dynamic economic growth. As Rostow suggests, all is premised on a sharp stimulus (or multiple stimuli) that is/are any or all of economic, political and technological change. The main feature of this stage is rapid, self-sustained growth. Take-off occurs when sector led growth becomes common and society is driven more by economic processes than traditions. At this point, the norms of economic growth are well established and growth becomes a nation's "second nature" and a shared goal. In discussing the take-off, Rostow is noted to have adopted the term "transition", which describes the process of a traditional economy becoming a modern one. After take-off, a country will generally take as long as fifty to one hundred years to reach the mature stage according to the model, as occurred in countries that participated in the Industrial Revolution and were established as such when Rostow developed his ideas in the 1950s.