I have an idea for my world, which involves a population of 200K to 500K people moving around the world all the time, in order to escape a climatic/geographical condition that chases them. There is a further complication in the form of destruction of all plants and animals by this climatic condition as it moves. So flora, fauna and humans are all on the move, constantly, to survive.

What would the major occupations be?

  • $\begingroup$ Check Inverted World by Christopher Priest and Dichronauts by Greg Egan, which have similar setups to what you describe, although in both cases the condition is more mathematical than geological. $\endgroup$ – Mike Scott Jul 13 '17 at 9:56
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    $\begingroup$ Welcome to WorldBuilding Vivian! Please take the tour and visit the help center to learn more about the site. Each of your questions is extremely broad and there are multiple questions. Please check out How would people living in eternal day learn that stars exist? and other questions about 9-year-days from that author which might help you. And worldbuilding.meta.stackexchange.com/questions/4868/… $\endgroup$ – Sec SE - clear Monica's name Jul 13 '17 at 9:59
  • $\begingroup$ Also Absolution Gap by Alistair Reynolds. And if memory servers, part of the Red/Green/Blue Mars series has something similar happening on Mercury. $\endgroup$ – Andrew Dodds Jul 13 '17 at 9:59
  • $\begingroup$ @AndrewDodds You can use italics by surrounding text with asterisks ("*"). For example this text. $\endgroup$ – Sec SE - clear Monica's name Jul 13 '17 at 10:01
  • $\begingroup$ @Secespitus - ta $\endgroup$ – Andrew Dodds Jul 13 '17 at 10:02

I see this question as strongly related to this one.

Having a population to be constantly on the move will prevent the onset of agriculture and, as a consequence, the development of cities as we know them since Babilonian age.

With a constantly moving population you can have hunters and gatherers, you can have livestocks, but you cannot afford the luxury of waiting one or more years to harverst your fields.

Therefore the most likely occupations you will end up having are:

  • Hunters/warriors (most likely adult men)
  • Harvesters (women)
  • Sheperds (young men)

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