I've split the "end of 2011/12 - start of 2012/13 positional rankings" into the following:
Forwards, which will be mostly strikers but maybe also some players here and there who people may view as wingers or attacking midfielders, but if they are generally the most attacking players on their teams I've included them here. Goalscorers.
Attacking midfielders/Wingers I've combined since there is so much positional overlap between those players. Some of the most goalscoring central midfielders will also be included here as well as among the other midfielders.
Midfielders will be primarily central midfielders but also various all-rounders capable of wide-play or in primarily defensive or attacking roles. Some will also be ranked as attacking midfielders.
Centrebacks almost goes without saying but as usual be aware a few has also recieved ranking boosts because they're also good fullbacks.
Fullbacks like with the wingers both left and right sided players.
The top 30 Fullbacks in the World (end of 2011/12 - start of 2012/13):
1 Dani Alves - Brazil - Barcelona
2 Sergio Ramos - Spain - Real Madrid
3 Marcelo - Brazil - Real Madrid
4 Maicon - Brazil - Inter
5 Philipp Lahm - Germany - Bayern München
6 Bacary Sagna - France - Arsenal
7 Javier Zanetti - Argentina - Inter
8 Eric Abidal - France - Barcelona
9 Fabio Coentrao - Portugal - Real Madrid
10 Jordi Alba - Spain - Valencia/Barcelona
11 Branislav Ivanovic - Serbia - Chelsea
12 Łukasz Piszczek - Poland - Dortmund
13 David Alaba - Austria - Bayern München
14 Darijo Srna - Croatia - Shakthar Donetsk
15 Domenico Criscito - Italy - Zenit
16 Alvaro Arbeloa - Spain - Real Madrid
17 Ashley Cole - England - Chelsea
18 Patrice Evra - France - Manchester United
19 Pablo Zabaleta - Argentina - Manchester City
20 Micah Richards - England - Manchester City
21 Benoit Assou-Ekotto - Cameroon - Tottenham
22 Stephan Lichtsteiner - Switzerland - Juventus
23 Mauricio Isla - Chile - Udinese/Juventus
24 Mathieu Debuchy - France - Lille/?
25 Gael Clichy - France - Manchester City
26 Adriano - Brazil - Barcelona
27 Filipe Luís Kasmirski - Brazil - Atletico Madrid
28 Kyle Walker - England - Tottenham
29 Rafael - Brazil - Manchester United
30 Yuri Zhirkov - Russia - Anzhi