I have a Moral Dilemma for you Entaru that you should enjoy
A species of large reptilian bipeds are expanding rapidly, the Krogan race. The Krogan Rebellions have just been put down. The Turian war machine, the greatest military in the Universe, is shattered. Salarian scientists are trying to find a solution to the Krogan problem. They reproduce quickly, and are very lethal and expansionist.
The choices and solutions possible also with possible outcomes:
Create a Genophage (genetic disease) That results with only 1 out of 100,000 Krogan Births to actually survive. However this choice will decimate the Krogan culturally, and they will resort to Barbarism to survive. This option keeps the Galaxy safe from the Krogan, and the Krogan safe from the Galaxy. However your dooming millions of unborns to die.
Genocide: Why not just kill all the Krogan?
Your wiping out an entire species. The disruption in balance could be very very bad. The Galaxy could hail you as a hero for wiping out the Krgan menace, but an entire culture lies wiped out at your feet.
Do Nothing: Doing nothing will spare the Krogan from any consequences, however the Entire Galaxy as we may know it could be conquered
Which do you choose?