This may apply to a single person over a life time (eg a neuroscientist); a single person persuing one objective (eg a building construction); a group of people over a short period of time (eg a football team in the cup final); or a group of people over a long period of time (eg the United States of America). Geography and environment, probably,have little effect on the development of the inention, as it is driven largely by will power.
An intention develops and grows over time, becoming more developed and characterstically itself over time. If the intention had increased the number of environmental/things that can help the intention to express itself further, then it will use them. The original intention becomes more apparant, manifest, to others until the point that it has developed beyond the poin that the cosmos can sustain it, and it dies. For instance if a society was born with the seeding intention of ever increasing population (i.e. high birthrate, breeding), then it would collapse at the point that it could no longer provide the physical sustenance (e.g. food and shelter) to maintain that intention. The cosmos could no longer sustain it, and the society would collapse. The remnants would then be free to choose their own new intention with which to seed the next, new society/culture.
So long as a society/culture has an inention lower, i.e. more base, than that of the original intention (be willful and creative and provide facility for creative willful things to grow), then the shorter its lifespan will be. This could be why cultures such as the Roman Catholic church, and the Buddhist monestaries have lasted as long as they have. Because their original inention was in accordance with the original intention, thus they have not succumbed to more base and short lived goals. A contrasting society/culture would be the East India Company, whose goal was to become the leading merchant trading company in India. It survived for around two hundred and fifty years, and managed to acquire much of India, but its intention was based on profit only, not long term growth (principaly, human development), thus it failed to provide for the future, and hence died (posthumously being taken over by the British Imperial Government, which then limped along for two centuries more before passing on).
It's possible that this is the reason that the warrior orders of the Roman Catholic Church (e.g. the Teutonic Order, and the Knights Templar) fell by the wayside, whilst others (e.g. the Franciscan, and Dominican orders) have continued on for over a few hundred years longer. Because the former were dedicated to territorial expansion and conversion (which logically had to come to a close at one point), and the latter were dedicated to ways of life (that can logically continue on for as long as humanity lives).
The original intention may change over time, caused by outside influence or presence of mind (the latter which causes the person/group to become self aware), which 'may, 'may' cause it to alter, depending on the will power of the person/group in question. It could be comparable to trying to direct a ball thats rolling down a hill. It's easier to change its course at the top of the hill, when the ball has less momentum than it is when the ball is closer to the base of the hilll, when altering its trajectory would only alster its final destination by a small margin. It could be possible that modifying an intention is easier if it is more in accordance with the oringinal inention (Creative generative will) than if it wasn't e.g. a country dedicated to warmongering would find it harder to alter its path than one which was based on technological advancement.
Again, with regards to the Roman Catholic orders, the original intention of the Knights of Malta/St John (formerly the Knights of St John the Hospitallars (?)), was to provide sanctuary for pilgrims enroute to the holy land. But since the holy land is presently accessible to Christians, the original intention of the Knights is superfluous, hence, they were provided with two choices, either disband, or adapt. They chose to adapt, and thus modified their intention to providing charity based health care to the general public, regardless of whether they are Christian or not. This is an example of a modification of character/inention which is good in itself and begets and facilitates goodness, hence, it should last for aslong as people want to work for it, regardless of environmental changes (e.g. economic or political or social turmoil).