== Introduction - 3rd and 4th sentence == 

 The placing of the sentence about Canada and Nicaragua in the introduction immediately after the sentence 'Each movement has, with varying results, sought to influence public opinion and to attain legal support for its position' jars badly and implies that the respective positions on abortion in these two countries have been arrived at simply through direct action by two clearly defined groups, rather than by the respective process given in Abortion in Nicaragua and Abortion in Canada.  
 I can see why these two countries were chosen to show opposing stances, but because of their polarity, they appear to me to be rather weak examples to cite in an article focused on the abortion debate.