I spent a few months sharing an office with Elisha Kally after he had been demoted from TAHAL's chief engineer position. At that time, he was marginalized and exiled to the Latin American Dept. He was introverted and I was, as always, super-busy with my personal projects, so we never really had a conversation. In the seventies, he had been the head of the Nicaraguan mission and my boss for a whole year, but he left me alone totally unmanaged. I remember that he was not appreciated by the locals, who said he may be a good engineer (they were not sure) but shouldnt be allowed to have any managerial position. He gave me his short book "The Battle for Water" where he describes Israel's largest and most exciting project - the National Water Carrier - so boringly that I could never finish it. He died a few days ago at 84.
I discovered that on Oct.7, 1995 he wrote a letter to HaAretz, of all things, about the existence of God. I translate:
The God of the Chief Rabbi Ovadia Yoseph created the world in six days during he worked hard day after day creating plants (the Second Day) and animals (Third and Fourth Days). The God of Professor Leibovitch created a mechanism that brought about all the above with no haste (in millions of years) - automatically. Without deciding which of the two is more sensible, Prof. Leibovitch's automatic creation mechanism is more sofisticated, more interesting, and more godly. It has only one problem: it makes God superfluous.
Since Newton we know that God is not necessary in physics, and since Darwin we know that the origination of species takes place without the intervention of God. In other words, if God exists, he set the management of the world on "automatic pilot" making his intervention unnecessary and probably impossible. The question of the existence of God has no practical meaning, it demands no solution and can be left unanswered forever.