Answer:
The phrase means that even if the action was or seems wrong, the outcome or result means it was not really wrong. The phrase strictly, applies to cases where the moral outcome is truly superior to no action. Otherwise the end would not truly justify the means.
As the Roman Empire expands it influences the civilizations that it ruled over. Romans tend to Romanize the people with the roman culture and the way of living and making a roman citizen the dream of every people inside its domain. Also the way the roman culture is propagate is through games and festivals adding more attraction to the other culture to affiliate themselves with the roman culture. Also the roman system becomes the foundation of a lot of empires and kingdoms even after the fall of the Roman Empire.
Discrimination against african americans and segregation
No. Japan bombed the Pearl Harbor mainly due to being desperate. The US had placed an embargo (no trade rule) on Japan. This led to no trade between the US and Japan and led Japan to losing a lot of money.