Sorting problem in Ch. 12 section Rite of Passage:Sorting

Recursive sorting

def sort(mylist)
  recursive_sort(mylist,[])
end 

def recursive_sort(unsorted_array, sorted_array) 
		if unsorted_array[1] == nil
			sorted_array.push unsorted_array[0]
		 	false
		elsif unsorted_array[0] == nil
			false
		elsif unsorted_array[0] < unsorted_array[1]
			sorted_array.shift unsorted_array[0]
		elsif unsorted_array[1] < unsorted_array[0] 
			sorted_array.shift unsorted_array[1]
		else
		end
		recursive_sort(unsorted_array, sorted_array)
		return sorted_array
end

keeploop = true
wordcollect = []
while keeploop == true
  puts "Type a word"
  word = gets.chomp
  wordcollect.push "#{word}"
  if word == ''
  	wordcollect.pop
  	sort(wordcollect)
  	keeploop = false
  end
end