Fun fact: Singapore's equivalent to Disneyland, the island of Sentosa (home to Universal Studios etc), used to be called "Pulau Blakang Mati", or "Island of Death from Behind", because of its incredible malaria rates.
And yet 5 million humans swarmed in and Singapore is among the highest nominal GDP countries in the world. Shows that there's little hope bringing balance between humanity and other species in the current economic system.
Well it wasn't 5M until recently. And one could argue that putting 5M people into a tiny island is being efficient with space, leaving vast swaths of Malaysia untouched (where it wouldn't be if Singapore wasn't so dense).
Sometimes I think mother nature just looks at people shaking her head quoting the line from Last Crusade, "you chose poorly" on selecting where to live.
The island started out as a swamp.