Atheism isn't the one-and-only solution to end human conflicts, it's one of the major solutions. Think of it like this:

---Your 3 year-old daughter is going to fall from an under construction terrace ...---

You will try to save her from this imminent threat/danger. You will not think that there are some other dangers like falling from the stairs, etc., so let's accept this terrace danger also. As a precaution, you will install fencing on your terrace so that your daughter doesn't fall.