yup

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Across
  1. 5. writers
  2. 6. practice of farming
  3. 15. new stone age
  4. 16. god war shippers
  5. 19. getting food
  6. 20. men in charge
Down
  1. 1. fertile land
  2. 2. taming or plants and animals
  3. 3. royals
  4. 4. a river
  5. 7. pottery makers
  6. 8. where animals came from
  7. 9. art
  8. 10. a country
  9. 11. person in charge
  10. 12. food
  11. 13. the ice age
  12. 14. defenders of the country
  13. 17. a river
  14. 18. early stone age