Usually the political literature in Afghanistan is full of harsh self-hatred words which are not good practice for national unity and shaky democracy of this country. There are some model nations in the world when they face the threat of terrorist attacks; instead of blaming one and other, they have each other’s back. They understand that terrorist is entirely the common enemy of all culture, all races and all peaceful people. The worshipers in France, Norway in some part of Egypt protect every place of prayer, no matter what religion or race they belong to. Christians guard the mosques as Muslims pray and Muslims return the favor by protecting churches during Sunday services.
Unity is the act of joining together and working together as a communion unit in order to achieve common goal. When all the people of a nation join together and work collectively for the well being of the country, it is called national unity. This feeling of national unity is crucial to lead the nation towards progress and prosperity and this feeling of national unity helps strengthen the nation and promotes peace and prosperity. Where people are united, they can put efforts in elimination of like corruption. It gives people sense of security for they are able to know each other better and understand each other’s sensitivity. Unity promotes co-operation and opens opportunity to excellence.  
People residing in Afghanistan, somewhat, belong to different castes, religion and ethnic groups. This diversity of caste, colors, religions, languages and cultures is our own identity. They are like different flowers in a garden. The beauty of the garden lies in the varieties of its flowers and fragrance. This is the unique feature of Afghanistan. Whatever caste, creed, culture and customs we follow, we are all Afghans the beautiful flowers of the same garden, Afghanistan. We should think that the progress of the country is in our own progress while its misfortune is the misfortune of every Afghan Citizen. According to national and international law, the first important principle of peaceful life is equity and equality regardless of their race, language, culture, color, religion and gender.
Unfortunately, all of these recognized important values are more similar to a dream rather than a reality in Afghanistan, as some of the leaders and heads still play with words and believe as if they are the superior child on this land. Anyway, we have to cross these barriers and cultivate a new culture of communion and real unity beginning from all coaching and cultural centers in new Afghanistan. The new generation should reach this understanding thatIf they keep on dividing into different unities, it will end up as a collection of monkeys throwing nuts at each other out of separate trees. Then like always, the name of Afghanistan will stay top in the world at list of all black things.
Any unity which does not have its origin in the multitudes is tyranny. In fact, Unity in diversity is a concept of "unity without uniformity and diversity without fragmentation that shifts focus from unity based on a mere tolerance of physical, cultural, linguistic, social, religious, political, ideological and/or psychological differences towards a more complex unity based on an understanding that difference enriches human interactions."Unity in diversity" is a popular motto within and among nation states, and also in political and social movements. But the deep feeling of unity is not formed by motto or speeches it is beyond words and also concepts.
More importantly, building a great united nation largely depends on its heads and leaders. We have to remember to vote for a leader who unites, not divides, a leader who encourages diversity, not racism, a leader who is recognized not unknown, a leader who strongly determined against terrorism, opium and corruptions, a leader who says what they mean, keeps their word and does not lie to their people. We need to choose a leader who supports the true freedom of speech, not censorship a leader who will not only bail out banks and airlines, but also families who compelled to moving to other countries, a leader who can prioritize the big national issues, not like kids playing with sub-issues, a leader who is strong, confident and Intelligent, but not sly and the One who understands the needs of all citizens equally -- not only a specific tribe. Finally the leaders and heads must be selected on the basis of Meritocracy criteria not traditional consideration so that he can unite entire unities and remove the name of Afghanistan from all shameful things.
To contribute the national unity, all citizens are responsible to abandon the notions of 'otherness' and embrace 'togetherness'. also learn from other developed nations how to live peacefully and learn that Allah is one, the one sun shines to all equally, the goal is one and we have one country with one common interest and common troubles. We cannot achieve something if we are not united.
The world is no longer white, black, yellow and brown etc. Through love, tribes have been intermixing colors to reveal a new rainbow world. And as time passes, this racial and cultural blending will make it harder for humans to side with one race, nation or religion over another. Therefore, practical wisdom should be used to abandon any cultural, social, religious, tribal, and racial beliefs leading to disunity. This is the only way to evolve as equal Afghan citizens. Segregation is a word of the past. Only unity is synonymous to victory if there is no unity, no victory.