Is the attainment of natural wisdom exclusive to Buddhism? Regardless of the medium, or the path, do you know of any other traditions, or religions, or ways to attain wisdom? Wisdom as it's known in buddhist tradition: Seeing things as they are.
Dhamma isn't exclusive to Buddhism. As the story goes, wherever there are apple trees, there are apples; but one can't expect to find apples where there aren't apple trees. Likewise, can't expect to find wisdom teaching where wisdom is not being properly taught.


  While sitting on one side the wanderer Subhadda said this to the Gracious One: “Those ascetics and brahmins, dear Gotama, who have a community, a group, who teach a group, well-known, famous, religious founders, agreed upon as good for the people, such as: Pūraṇa Kassapa, Makkhali Gosāla, Ajita Kesakambala, Pakudha Kaccāyana, Sañjaya Belaṭṭhaputta, Nigaṇṭha Nāṭaputta, have they all understood, according to their own avowal? Have they all not understood? Or, have some understood? Or, have some not understood?”
  
  “Enough, Subhadda, stop this: ‘Have they all understood, according to their own avowal? Have they all not understood? Or, have some understood? Or, have some not understood?’ I will teach the Teaching to you, Subhadda, listen to it, apply your mind well, and I will speak.”
  
  “Very well, reverend Sir,” the wanderer Subhadda replied to the Gracious One, and the Gracious One said this: “Wherever, Subhadda, the Noble Eightfold Path is not found in a Teaching and Discipline there a true ascetic is not found, there a second true ascetic is not found, there a third true ascetic is not found, there a fourth true ascetic is not found.
  
  But wherever, Subhadda, the Noble Eightfold Path is found in a Teaching and Discipline there a true ascetic is found, there a second true ascetic is found, there a third true ascetic is found, there a fourth true ascetic is found.  
  
  -- Mahāparinibbāna sutta, DN 16