The Prakash Jha project on the Indian government policy of reservation has a universal theme, the actor feels.
Bachchan said: "This is such a poignant film with a strong message that needs to be delivered to the public.
"Discrimination is a universal phenomenon which the common person encounters in his or her everyday lives all over the world, so it is a film that can appeal to a mass audience on a global scale."
Aarakshan has been primarily filmed in Bhopal, the setting of Jha's 2010 release Rajneeti.
"This film transcends background and divisions based on gender, class, ethnicity and so forth. [It is] a must see film!" Bachchan added.
Deepika Padukone, Saif Ali Khan and Prateik Babbar feature alongside the veteran star in the movie.
Aarakshan releases worldwide on August 12.
Watch the official theatrical trailer for Aarakshan below: