Iranian President Mahmoud Ahmadinejad in a meeting with his Nigerien counterpart Issoufou Mahamadou underscored the necessity for joint and global efforts to establish peace, brotherhood and justice.During the meeting in Niger\'s capital of Niamey late Monday, President Ahmadinejad said that Muslims should think about establishment of justice in the entire world.\"If we target establishment of global justice and monotheism in the world, in that case achieving unity will be easy,\" the Iranian president added.During the meeting, the Iranian and Nigerien presidents exchanged views on bilateral relations as well as issues related to the African continent and international developments.President Ahmadinejad has on many occasions underlined the necessity for the establishment of a new world order, saying that the current unjust order has failed to resolve global problems and, thus, reached its end.Ahmadinejad left Benin for Niger on Monday on the second leg of his three-nation tour of Africa. After Niger, the Iranian president will travel to Ghana.