Countries always confuse me. Part-1

Countries always confuse me.
My great grandfather pledged his loyalty to the British Crown. My Grandfather came to know that he could live in a country of Hindus if he crossed a river or he could live in a country of Muslims if he didn't. My father found great sanctity in the people who lay their lives for a secular state ruled by Bangalis-people who speak Bangla. Today, teachers in my school teach me the difference between Bangali and Bangladeshi. All the people who speak Bangla are Bangali but only the ones who live in Bangladesh are Bangladeshi. All Bangladeshis are Bangali but all Bangalis are not Bangladeshi.
I don’t love the country my great grandfather loved because my grandfather idolized the people who fought against that county. I don’t even love the country my grandfather loved because my father idolized the people who fought a war against that country. And I am not sure that my child will love the same country I love. Maybe the definition of ‘them’ and ‘us’ will change again before he is born.
Why is this ‘them’ and ‘us’ so important? Why is it so necessary to differentiate people from each other? Maybe it is so important because we cannot hate them if they are a part of us. They must be separated from us to rationalize our hatred towards them. Differentiation fosters hatred. It makes us forget that, despite our differences, we are all human. We are all part of the same species: Homo sapiens.
And as Homo sapiens, it is the responsibility of each of us to somehow contribute to the voyage of mankind towards the omega point, the highest peak of knowledge. I believe that I can participate in this venture through my plans of uniting the world into a single system of governance. I think that achievement of omega point will be jeopardized if people from different parts of the world get different treatment and different opportunities. A society of complete equality cannot be established through a system of complete inequality. The process of differentiation of countries from countries incubates the sense of alienation and enmity that has led to useless massacres of human life and dignity so many times in history.
I think that this system of differentiation is very barbaric at its core. We have evolved as creatures, individually and as a society, collectively. But yet we create groups in the collection. The primitive sense of tribal rivalry still possesses us. We must evolve out of it. Humans must not be differentiated from each other. It is barbaric to say that someone cannot do something because he was born somewhere and not somewhere else. Perish of differentiation in countries may seem radical, but so seemed the idea of enfranchisement of African Americans one day. As Nelson Mandela once said, ‘Everything seems impossible until it’s done.’
I believe in the system of world government. I believe that it can be implemented and if implemented, it will dissolve the most latent yet most potent discrimination of our time. Through my years in college, I wish to dig deep into this theory of mine and explore governance systems that have persisted and reasons why they persisted. I will try and make each and every detail of my model so strong and feasible that I can start to implement it as soon as I graduate from college.
Through my study in international relationship at your university, I wish to figure out a way to convince world leaders to participate in my endeavor and tie the world together. I believe that I would get the best environment, encouragement and enlightenment I need to pursue my dream.