A thought just occurred to me. You know how they needed the keepers then later the geth and saren to open the citadel arms to open dark space to let all the reapers in the galaxy. How is it that the Reapers are able to come from dark space without the citadel opening dark space for them to come out of? Also why did the Reapers create the Citadel? What was the purpose in that? Also if the Reapers never needed the citadel to come into the milkyway galaxy then what was the point in ME1 dealing with sovereign and saren? Another thing why was it that the reapers or indoctrinated servants of the reapers tried creating a human reaper? They created all other reapers the same as harbinger so why change it up? Also Why didn't they create a different kind of reaper for each cycle? One last question, What was the point of the whole war between the geth and the quarians? It doesn't make sense to me period. Can someone help me out here?
How did the reapers come from dark space?
A. You can keep your momentum forever in space, until you hit another object. The reapers can travel from dark space but it takes years.
Why did the reapers create the citadel?
A. Quoting sovereign: "Your civilization is based on our technology, by using it, your society develops along the paths we desire". The Citadel was cleverly put there so that organic civilizations would make it their "home" and center of their civilization. Then, when the reapers came through, they could pretty much eliminate all communications and have files on every organic race, locations, order of command etc. In short element of surprise as vigil told you.
What was the point of dealing with saren and sovereign in ME1?
A. Because if they took control of it, they would have the element of surprise again. Every army will be at disarray just like what happened with the protheans and every civilization before them, as Vigil told you. Then its game over for organics. Even javik elaborates on this.
Why create the human reaper?
A. Dropped plot point from the dark energy plot. The human reaper, due to human genetic diversity (lol) would help the reapers stop the spread of dark energy, which was rampant. That is supposedly why they farmed civilizations, trying to look for the best. The protheans weren't it so the were turned to bugs.
Why didn't they create a different reaper for each cycle?
A. Really, doesn't matter. Its like asking why darth vader wore a cape.
Point of war between GETH and Quarians?
A. Constructing self aware AI is forbidden by council law. In their last attempt to cover it up they started destroying the geth, hoping they would get dumber by decreasing their numbers.
Also they were afraid that they would revolt, just imagine waking up in a world where you're a slave, you want to free yourself. The quarians panicked and tried to shut them down before it was too late. Tali said all that in great detail if I remember correctly. Have you even spoke to her?
The question "Does this unit have a soul" is a representation that its becoming self aware.