Merry Christmas

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Across
  1. 4. / hypothesis or unproved assumption
  2. 5. / a form of government in which leaders are elected; they are not kings
  3. 7. / humanlike creatures that walk upright
  4. 8. / discussed by considering opposing viewpoints
  5. 11. / a sudden, radical or complete change; an overthrow of a government
  6. 13. / first writing system of the Aryans
  7. 15. / A seasonal greeting
  8. 16. / a dark natural glass stone formed by lava
Down
  1. 1. / very broad in range
  2. 2. / as administrative organization usually part of a government
  3. 3. / great; significant in size or importance
  4. 6. / conforming to accepted standards of conduct; moral
  5. 8. / adapted to life with and for the use of humans
  6. 9. / a government established by a divine authority
  7. 10. / to set apart from others
  8. 12. / process of changing to city life
  9. 14. / to remain alive