There are a lot of people who don't care about mass extinctions. For example, you will not get a uniform question to "A 6-year-old kid has a rare cancer, never seen before, that is defying all medical knowledge, but seems to be controlled by an extract of the pituitary gland of a panda bear. Researchers in the field have determined that a one-shot dose from 1,000 pandas has a 90% of permanently curing her, but that's half of the pandas in the world today. Should 1,000 pandas be killed to try to save her?"