On January 27th, International Holocaust Remembrance Day is observed to commemorate the victims of the Holocaust. This tragedy resulted in the death of 6 million European Jews, with 1.5 million of them being killed on the territory of Ukraine. Most of the Ukrainian Jews were killed in mass shootings, making Babyn Yar in Kyiv a symbol of genocide in Ukraine. This day serves as a reminder of the dangers of hatred, bigotry, racism, and prejudice, and is an opportunity for the international community to reflect on the concept of collective security in today's globalized world. We must all work together to ensure that tragedies like the Holocaust never happen again.