In what ways did the concept of war change from the Spanish American War, through WWI and WWII? Was there a war(s) that was just? Explain your response with specific historical details. Even if you do

In what ways did the concept of war change from the Spanish American War, through WWI and WWII? Was there a war(s) that was just? Explain your response with specific historical details. Even if you don’t think there was a just war, you must explain your thinking.