Controversy begets controversy. Films - and in particular, documentaries - about contentious subject matter often provoke even more of it, with those outed in the movie - whether they be corporations or religions or just sole people - eager to defend themselves, to denounce the filmmakers and and instead level at them some of their own controversial claims. These are the best kinds of documentaries, the most important ones, and history is rife with them. It just so happens, then, that the last decade or so has seen the genre of controversial documentaries flourish, with countless examples of them flooding the zeitgeist with since the year 2000. It can be said that this period has been the greatest ever for films of the kind, and we've picked ten essential ones out that must not be ignored. Ranging from exposes on beloved institutions, to family dissections, to issues on a global scale, this list will doubtless provide you with some of the most controversial documentaries of the last fifteen years.
