I have a question (or four)..... Is There any way to become "more good" without planet events? Does starting wars or eliminating a race make you "more evil"? Can you trade "good" & "evil" techs to those not of the appropriate alignment? and where can you find what your alignment is?
Nothing to do with wars can make you evil. The morality events are the only thing that decideds your morality.
You can trade for and use alignment-specific techs even if you are of the "wrong" alignment. You can find your alignment in the "stats" tab, under "society," in the domestic policy screens.