Whatever666343431431654324 wrote...
Again, look at what they do:
1) They give organic life technology to advance along lines that they desire
2) They harvest the technology of that organic life
3) They constantly test and evaulate organic life
4) They sometimes harvest the biological life itself to create new Reapers
5) They are clearly fascinated by Shepard and want him for some purpose
6) At the end of every cycle, they scrub the galaxy clean of every species that knows about them and then hides for 50k years to wait for the next batch to mature
So we have some easy to make conclusions:
a) Permenantly killing off organic life is clearly not their goal.
They reproduce but since Reapers are immortal, reproduction is clearly not required to sustain numbers.
c) They allow life to evolve naturally but then when they reach a certain technological state, they guide that species to a certain technological state
d) They are very fussy about which species they use to reproduce: they must meet specific biological and technological criteria.
Personally, I think this is the Reaper's way to grow and evolve. It likely has to do with their origins, which will explain their internal motivations.
This, pretty much. The killing of organics and production of new Reapers is not the goal in and of themselves. If the Reapers wanted to prevent life from growing in the galaxy, they could patrol it and bombard everything that grows. If the Reapers wanted to make as many Reapers in possible, they could both lower their standards and focus on indefinite harvesting of a suitable species.
Most likely, I'd see the Reapers intent as they have said: salvation and ascension of 'worthy' species. The destruction is likely a necessity to avoid some greater threat: I'm a proponent of over-use of Mass Effect/dark energy myself. (As in, if too much is used in a time span, the galaxy dies and no life will be born.)
I'll give my speculation on some of Whatever's questions.
But also some questions:
Why is it important for organic life to evolve along the Reaper's technologically approved path?
It's important that there is no single approved tech path. There is not a rail of Reaper-allowed technology: rather, there is a spectrum of technologies that species develop with their own twists. The Leviathan of Dis's creators made an organic space ship: the Protheans made psychic beacons. The Salarians made a genophage, the Council made the galactic standard, and Humans have made fighter carriers and stealth ships.
It's mistaken to think that there are paths we are not allowed to take: the Reapers allow much greater variation than any restrictions we have either seen. Their only impetus is the concept of the Mass Effect itself... which itself is a dominant technology no matter the way it is applied.
The Reaper's strategy doesn't depend on the exact technologies a species uses. Rather, it relies on the Citadel trap itself, independent of the adoption of any 'approved' path. Sovereign's metaphors, we have since learned, were surprisingly literal on a number of levels.
Why do they bother to reproduce?
Likely for what they claim: to save 'worthy' species. Being a Reaper isn't an identity, it's a category for the saved. The Reapers aren't 'reproducing', in the sense they are making another one like themselves. The Reapers are already unique.
Why do they allow organic life to evolve naturally - they could simply farm us like a crop?
Because while they value life (in their own way), they prioritize diversity over duplication. Duplication is already covered by the nature of the Reapers themselves: with each Reaper being a gestalt-AI of the species it is created from, there is no impetus or distinct value from two Reapers of the same species. The Reapers (by and large) already have the numbers they need from the normal progress of the cycle.