You statements are simplistic, naive and just wrong.
Read a damn history book. No country in history has ever "become the ruling force in a country by offering nice health plans and a school for everyone". The Visigoths who were defeated by the Muslims conquered the country through force after they finished sacking Rome. Every country has blood on their hands. Stop being simplistic.
I feel like you want to believe that human history and interaction is a series of simplistic events, carried out by caricatures rather than by complicated human cultures, each with their own desires, fears and circumstances. It's never that simple. NEVER.