"What is possible?
What is likely to happen?
What is desirable to have happen?
In a sense the first is Science—what is possible. The second is Engineering—what are the human factors which choose the one future that happens from the ensemble of all possible futures. The third is ethics or morals or whatever other word you wish to apply to value judgments. It is important to examine all three questions, and in so far as the second differs from the third, you will probably have an idea of how to alter things to make the more desireable future occur, rather than let the inevitable occur and suffer the consequences."