Carl Sagan's ideas have attracted widespread criticismfrom two main points of opposition. The first argues that the trend is in fact not in that direction, as part of the reason why we evolve is in order to continually face a greater URL Therefore, without an enemy that places the whole of humankind on the other side, panhumanism is not possible. The other group argues that although Sagan is correct to assume that the trend is in that direction, it will never happen naturally because we artificially slow the trend ourselves by punishing racism. According to this argument, applying Sagan's logic leads you to the conclusion that racists are more evolved than nationalists, because they associate with a higher level of URL
Carl Sagan's ideas have attracted criticism. Some argue that the trend is in fact not in that direction, as part of the reason why we evolve is in order to continually face a greater URL Therefore, without an enemy that places the whole of humankind on the other side, panhumanism is not possible. 
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widespread criticismfrom two main points of opposition. The first argues
criticism. Some argue
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The other group argues that although Sagan is correct to assume that the trend is in that direction, it will never happen naturally because we artificially slow the trend ourselves by punishing racism. According to this argument, applying Sagan's logic leads you to the conclusion that racists are more evolved than nationalists, because they associate with a higher level of URL