<span>Before 1830 - The South defended slavery as a necessary evil. They argued that the emergence of cotton as the most important cash crop in the country made slaves necessary. Instead of defending slavery as a necessary evil, they began to defend slavery as a "positive good."</span>
The Jewish–Roman wars are often cited as a disaster to Jewish society. The defeat of the Jewish revolts altered the Jewish population and enhanced the importance of Jewish diaspora, essentially moving the demographic center of Jews from Judea to Galilee and Babylon, with minor communities across the Mediterranean.
The battle of Stalingrad was the major turning point.
The larger goal was uniting Americans around the war effort.
Cracking down on dissent would be a negative action in support of the larger, positive goal the government sought. The government wanted a fully united public in support of the war, and so it put out the message that that freedom of speech might have its limits in times of war.