Is unity a necessity?

To what extent is “Together We Will Win” an empty slogan? We are in a new and quite entertaining trend. Everyone enjoys the slogan “Together We Will Win”. On every corner you see stickers on vehicles and windows, television screens very generously use this slogan. The lecture will provide a broad overview of the topic and attempt to answer several questions: Is unity a necessary thing? How united have we been throughout history? Is it possible and/or necessary to unite at any cost? Is unity a prerequisite for victory or is a more fundamental condition required? What is the cornerstone of unity?