Nearly all political ideologies maintain that man has to plan the world according to his own knowledge and his own sense of what is true in order to bring the dreamed - of paradise on earth.
लेकिन परिणामों ने दिखाया कि रहन - सहन की नई परिस्थितियाँ नए मनुष्य उत्पन्‍न करने के लिए काफ़ी नहीं हैं ।