This figure often goes viral, so I'll explain it again:
The typical interpretation is
"Leftists care more about space rocks than their own family," which is what the image seems to imply. However, if you read the paper, you'll see that's incorrect.
Leftists
claim to care about "all things in the universe"
including their own family. This data is just evidence that Leftists are liars who virtue signal in ridiculous ways to hide their own selfishness and nastiness (see
this thread).
Leftists do have negative in-group preference, but that doesn't necessarily translate to sincere care for out-groups. It's more like a lizard brain revenge complex against their in-group.
"Among my kin I am an outcast; I'll make them suffer!"
The best example of this is climate change: none of their proposed policies will actually "save the planet," but they will expand the left's political stranglehold and harm their enemies.