nationalism

The Prophet said: "If one of you sees something evil he should change it with his hand. If he cannot, he should speak out against it, and if he cannot do even that he should at least detest it in his heart, this being the weakest form of faith" (Sahih of Muslim).

Despite the "progress" in culture, science and technology, racism, tribalism, nationalism, colonialism and the caste system have been mainly responsible for the death of over 62 million human beings in the last 100 years.