Theories of relativity

In the year 2010 scientist Lawrence M Krauss wrote an article in Wall Street Journal1 in which he had argued that as the total energy of our present universe is found to be zero, so from this it can be concluded that it must have originated from nothing. The gist of his argument is something like this: Let us suppose that the universe has actually originated from nothing at all. Then in that case the total energy of the universe would obviously be zero, because here everything has started from zero or nothing.