Answer: 4. . . . they do not rashly engage in war, unless it be either to defend themselves or their friends from any unjust aggressors, or, out of good nature . . .
Explanation: This quote reveals the most important thought that the passage holds about its topic, it summarizes what the text is about. All the other options support this main idea, for example, option 1 and 2 tell us about the people's hatred or opposition toward war, and option 3 tells us that even though they hate the war, they prepare themselves in case it happens. Finally, option 4 sums up those ideas and gives us the most important thought: the people do not engage in war easily, except in certain circumstances.
