The most stable base is a uniform circular base.

"MY: Actually when he met with Ikeda in 1992, Harvey [Cox] shared a very interesting thought about interfaith dialogue. He said one of the huge issues in modern society is the conflict between Christianity and Islam. So he said to Mr. Ikeda, “I believe Buddhism can be a bridge to connect those two,” and suggested that Mr. Ikeda play a role in that. Specifically, Prof. Cox used the example of the tripod. If you have only two legs, he said, it’s not stable. But with three, you can stabilize. So this tripod could consist of Christianity, Islam, and Buddhism. Buddhism can play this stabilizing role." -- Masao Yokota former Ikeda Center president

The most stable base is a uniform circular base. For harmony, peace, and happiness, it is Namu Myoho renge kyo and Namu Myoho renge kyo alone.