"Good" as determined by whom?

For example, there are people who hold the Scientific Revolution ushered by Galileo&co to be directly responsible for genocides and suffering (of humans and otherwise) on an unprecedented global scale.

In the long-term view suggested by inglor_cz, "change this world a little for good" is really just feel-good moralistic posturing. Without specifying "good for whom?", and "on what time scale?", it's a vacuous concept.