Not hard at all. His goal is to eliminate unnecessary deaths.
1) stack rank causes of unnecessary deaths (malaria, malnutrition, etc)
2) identify places where people die those deaths because nobody gives a shit about them
3) start giving a shit
In fact the acceleration seems like it’s happening because it has suddenly become far easier to identify unnecessary deaths because someone who shall remain nameless here lied about fraud in US Aid and cancelled all their funding leaving millions of people to die unnecessarily deaths.
Gates decided to step up and prevent as many of those deaths as possible in his lifetime.