Of course, it's possible! It can happen when the people on this one earth we share realize that the future of mankind is a common cause, regardless of the differences in language, beliefs etc. Every past revolution and adoption of democracy by countries, and formation of the United Nations have all had that aim. In practice, however, none of that has helped evolve a united humanity that shares and cares for each other!
Despite all the scientific advances, there's still a long way to go for mankind to learn Humanity!