Morally--many scientists in particular could predict the devastating effects of the atomic bomb. They urged leaders not to use the technology because they knew the death toll would be huge.
Financially--some also opposed the production of the atomic bomb as being a waste of money. Traditional military weapons were working and some were skeptical that the technology would even work.
The best statement that represents the theme of The Call of the Wild is WITH EACH NEW EXPERIENCE, BUCK BECOMES MORE ACQUAINTED WITH HIS ANCESTOR'S INSTINCTS.
Buck's ancestors lived in the wild, eventually because men settled in their habitat, they became domesticated. This is the situation where Buck was born in. However, as the story unfolds, Buck's instincts became more pronounced and he finally heeded the call of the wild.
Phillip II of Spain wanted to invade England to overthrow the Protestant Regime of Queen Elizabeth I and restore Catholic rule.
The Citizens who contributed advertising space felt they were doing even more for the war effort.