From an anthropological perspective, humans evolved from apes who also do things in groups. Birds fly in groups since it is safer to fly in a group. The more a species members collaborate the more they can survive the assault of predators. You may wish to read Ian Barbour's "When Science Meets Religion", John Polkinghorne's "Quantum Physics and Theology" or better yet view the interview by Robert Wright with John Polkinghorne here:
http://www.meaningoflife.tv/video.php?speaker=polkinghorne&topic=complete and with John Haught here: http://www.meaningoflife.tv/video.php?speaker=haught&topic=complete but mostly you will thank me for bringing to your attention this amazing interview by Robert Wright with Lorenzo Albacete; for Albacete then relates how development is tied with God's inexhaustible love in Christ:
Relationship is arguably the basis of security. Each child remains insecure if he does not feel the protection of his mother/father. Security is the first need for survival together with nourishment and shelter. However for my security, I need the protection of the powerful elders of the tribe or, in modern civilization, the government. If the most powerful governor dies, the political/economic order requires that he be succeeded by another competent person until a new one is chosen or elected. You see the order of human families, tribes, states and the globe itself requires relationships starting with the top person charged with protecting the interests and survival of his subjects/citizens.
In the contemporary complexity of interactions of humans, let's only mention the pervasive advances of information technology with artificial intelligence that promises robots will control human life in a few decades. Read MIT's Andrew Mcafee "Race Against the Machine." The impact will be enormous taking into consideration that young graduates from universities are hardly able to find quality jobs. The Baby Boomers are ageing but the workforce is not replaced adequately by younger generations for many reasons but one of them is that we have stopped bringing children to life. The use of artificial contraceptives by women and the steady killing of children in the womb have had a negative impact on the growth of civilization.
If the world needs to save itself it must renounce not only its divisions but also the Satanic powers that deceive and lure its inhabitants into selfishness and pride. These are not the results of today or even of the last decade but the cumulative memory of wrongs since humans began to think and want things for themselves independently of God. To guide us in the right way (i.e. the orthodox thought and action) we need unity that comes from God alone.. In spite of the failings in history by some Catholic bishops and faithful, I see this unity in the Catholic Church. If we have to be united let us be guided by the Bishop of Rome; for in the Christian tradition he is the successor of the one to whom Christ gave the keys of heaven. In fact, it is my opinion that not only Christians but all people of good will are already linked to the Catholic Church in a way that remains a mystery. As for why I think everyone should consider becoming Catholic, I refer you to my post at: http://todayquestions.blogspot.ca/2009/10/why-christians-should-be-catholic.html
and to my post at: http://todayquestions.blogspot.ca/2009/11/who-is-catholic.html
Let us pray for the unity of mankind. Seeing the divisions and the continuing violation of humans in the Middle East, it may be a dream to pray to God for unity. However it is written "What is impossible with men is possible with God" (Luke 18: 27) Thus said Christ the Alpha and Omega.