Casually I've read the Wikipedia pages about the atomic bombing of Hiroshima and Nagasaki.
One may hold that it was a cynic and useless demonstration of force and superior war technology that just claimed the life of tens of thousands of innocent people.
Reading better, one finds that
- The United States had lost one million of soldiers between June '44 and June '45.
- After Germany had surrended, Japan was given an ultimatum which was rejected
- Japanese were preparing for conventional war defence of their home from an invasion that would have taken place starting from autumn '45 and the Japanese military was accepting the prospect of losing up to 20 millions of people in this desperate defence.
- In Okinawa Allies losses to Japanase losses ratio was about 1 to 2, so the invasion of Japan would have costed the Allies an enormous toll.
Often truth is complex and to appreciate it requires a little of analysis. Instead we would often prefer to jump to easy conclusions, using just our instincts and guts. Also we would like there were a solution without drawbacks but sometimes there's none.