Tolerance is sometimes considered the negative attitude of one who does not accept, much less love, another human being but is willing to put up with, or allow for, the existence of others by being condescending. The concept of tolerance has become a key debate topic since intolerance towards diversity is a recurring situation in society. Undoubtedly, diversity reflects our real identities but at the same time we seem unable to handle it. Humanity - painfully stained by black slavery, religious wars, native Indian genocide, the Jewish holocaust, and prejudice against homosexuality and against women - is no longer willing to allow for intolerance of diversity. Intolerance is not just a question of not accepting diverging opinions: hate is an aggressive perspective that is responsible for destroying diversity. Thus, education has an important role to play in the battle between less tolerant societies and those that are more open to human diversity. However, not just any kind of education will suffice. It is important to select an education project approach that offers a comprehensive definition of tolerance based on facts. My research study aims to fulfill that role. Therefore, I tried to offer a background on the concept of tolerance, from the Renaissance period until recent times, highlighting the historical battle between intolerance and tolerance. To further expand on the concept of intolerance I used as reference Hannah Arendt´s research work, specifically selecting the concept of banality of evil. To further support this thesis, I referred to Adela Cortina´s theories on ethics of minimum requirements. Ultimately, my paper states the thesis that tolerance represents a big step. It represents the basic belief- system both in the field of ethics and education. Tolerance is a moral minimum requirement, the basic building block which reveals what is fundamental. However, the definition of fundamental is actually not what constitutes minimum requirement but, instead, what is considered invaluable, essential, and cannot be lacking in social interactions, much less in education.