Originally posted by ChrisR:
Has anyone any ideas for adjusting UWP's of systems for different time settings? i'm looking to convert data from CT, MT and TNE to T20. ie 100 -200 years before.
Here are a few ideas off the top of my head.
Most of these guidelines are built arround aging planets so you will need to reverse them to find the statistics for the earlier version.
I'll ignore physical stats because except in very catastrophic circumstances there won't be any changes in those that will come even close to being a rounding error on the scale of the UWP. An atmosphere might gain a taint because of some major ecological hiccough but that's about it.
Population.
Depending on the sector involved populations might be advancing, stagnating, or rarely (I suspect) retreating. For the Spinward Marches you can assume that most populations have been advancing. For the Solomani Rim and Core most planetary populations should be stagnant. I can't think of a good candidate for sector wide retreat of population prior to MT/TNE but individual worlds may prove inhospitable.
How much should you adjust populations by?
Assuming a 1% growth rate the population will double every 70 years. So over 200 years it wouldn't be teribly out of wack for populations to increase by any factor up to about 10 (one full digit in the pop code) although doubling or quadrupling might be more likely.
For smaller worlds (say pop 6 or less) growth or shrinkage may be more affected by imigration and emigration than birth and death rates so at the lower reaches much more dynamic changes (both up and down) are likely.
Government.
Almost any planets government can radically change in 200 years but can also stay largely the same.
Some governments are likely to evolve in more or less predictable ways.
Gov 1 is likely to move toward 3, 5, or 8
Gov 2 is likely to gravitate toward 4
Gov 4 and 5 may tend toward 8 (or may not)
Gov 8 will tend to degenerate into 9 or perhaps even to C
Gov A by definition evolves into B
More radical changes are likely the result of revolution and will tend to be somewhat less common than evolutionary change.
Law level.
I suspect Law level will tend to increase with time but as in population the reverse is also possible. If a planet's government changes it's law level should change a similar ammount plus or minus one depending.
Tech Level.
In general you can assume 1 TL difference between 1000 and 1100. This is only a hard and fast rule at TL 14/15 at lower techs it's possible that technology will advance faster (or even slower.) Tech progres should probably be more rapid in sectors with populations that are advancing and slower in stagnant and retreating sectors.
Starports.
Are probably somewhat static though they will tend to advance if they change at all. They are more likely to expand if population and tech level are also rising than if both are stagnant.
As always YMMV