Not all human blood are equal thanks to the antigens that prefer to strap themselves onto surfaces of cells. They are like a signal flare to inform soldiers whether target is friendly or not, most of the time the intelligence is accurate. I want only a specific blood type for humanity and I'm confused between type O and type AB, which is preferred medically? How to go about it with minimum casualty and within a decade time? Answer with the least casualties, lowest budget and shortest time frame wins(you may throw ethics out the window).
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A population of type AB is not stable. Given a uniform population of type AB, the next generation will be 25% type-A, 25% type-B, 50% AB.
A population containing only type-O will be stable as each generation will continue to be type-O.
- Enable word level government
- Forbid reproduction to those who do not have 0 blood type.
- Wait until the reaper does it job.
Btw, the only reason why 0 is preferred is because it is more compatible with other types: 0 Rh - has no "labels", to raise alarms, so anybody can accept it. AB Rh + instead has so many "labels" (A, B and +) that can be accepted only by those having all the 3 of them.