IMHO I think any well planned expedition on such a scale would try to take into consideration controlling in transit population growth, probably through a combination of mandatory birth control (Norplant etc), scheduled conception, and abortion. Those who tried to circumvent the rules might risk forced sterilization.

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> On Jul 8, 2022, at 6:21 PM, Kurt Feltenberger - kurt at thepaw.org (via tml list) <xxxxxx@simplelists.com> wrote:
>
> On 7/8/2022 5:08 PM, Bruce Johnson - johnson at Pharmacy.Arizona.EDU (via tml list) wrote:
>> Hey All,
>>
>> I'm writing up the backstory for a new non-TU Travelleresque game. I'm using The Last Parsec setting for Savage Worlds as a basis for this, but rewriting it to make the setting rather smaller (you can travel to different *galaxies* in TLP and I'm too much of a homebody for that). Anyway, a major feature of the setting is that - until very recently in the pre-game timeline - all settled worlds were either the homeworlds of various alien races or one of the handful of worlds settled by STL ships launched from Earth some seven centuries prior to game start. The furthest-out human colony is some 500 lightyears from Sol and jump drives mostly have only been in use for a little over 100 years.
>>
>> What I'm trying to figure out is how long each world has been settled in actual elapsed time. I'm also keeping in mind how subjectively long the settlers *think* they've been at this, as that will give some indication as to current population as well as how much time their culture has had to deviate from that of baseline Earth. [NOTE: The Savage World setting already emphasizes that even the longest-settled of the colonies won't have had time to diverge far in the genetic sense.]
>>
>> A space travel calculator I found through a Google search tells me that - assuming constant acceleration at 1G, turnover, then constant deceleration at 1G - a 500 lightyear trip takes only 12.116~ subjective years for the colonists but 501.935~ years for the rest of the universe. I'm using 1G because I'm assuming that the colony ship is a hollowed-out asteroid using an Orion drive. Of course, I'm postulating that 22nd-century Earth isn't going to remain silly regarding the use of nuclear explosions for peaceful purposes in space.
>>
>> Thoughts?
>>
>> --
>> Richard Aiken
>
> Some of the variables that I had to use when I worked up the subjective duration for the "Earth to the Colonies" refugees in by BSG work was how close to C you got, how long you stayed there, and then how long it took to decelerate.  Reaching just less than C took relatively little time (subjectively and objectively) and from there it was a matter of simply maintaining it to you were ready to drop back into normal space.
>
> For trips lasting more than a generation (say 20 years or so), I would look into a population calculator.
>
> https://www.metamorphosisalpha.com/ias/population.html  (Sadly, it looks like this isn't working properly...)
> This one, though, does: https://calculator.academy/population-growth-calculator/#f1p1|f2p0 The current rate of population growth (today) is ~0.012%
>
> This is important because you may run out of space/resources before you get where you're going.
>
> For example, a colony ship with 100,000 people, current growth rate of .012%, and a 200 year trip will wind up with a population of just under 103k.  Granted, it's only a ~3% increase, but if it isn't considered, the colonists will be facing some very brutal cold equations which could lead to some interesting cultural development.
>
>
>
> --
> Kurt Feltenberger
> xxxxxx@thepaw.org/xxxxxx@yahoo.com
> “Before today, I was scared to live, after today, I'm scared I'm not living enough." - Me
>
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