The reason religion is so powerful

[R00tKiT]

Your chart says nothing about "the likelihood of a non-religious country to enter a war." Your chart displays the percentage of wars caused by religion. And why do you think my country is nonreligious? You don't know what country I'm from. My country could be painfully and stupidly religious depending on what factors one uses to deem a country "religious."

Well, we can simply take this likelihood to be the ratio of non religious wars per the total number of wars, which is exactly what this chart displays. It's the well-known frequentist approach in statistics.