Why the western democracy did not get accustomed neither in the world, nor in the West?

Since the most ancient times thinkers looked for a formula of the ideal state. The scheme which would eliminate any contradictions between any people. Modern option of such utopia is the democracy with rule of law. However no controls with counterbalances are capable to deprive of the person (especially group) free will and private interests. And therefore democracy quickly adapted under the strangest...