That's a documentary film based on some conspiracy theories. Actually the one concerning 9/11 attacks made the film popular. According to what they said about this subject, 9/11 was a fiction organized by the US government in order to have an excuse to enter to Middle-East and have access to oil fields. You may also find some topics on the families Rockefeller and Rothschild and how they became so rich. I watched both of them, Zeitgeist and Zeitgeist 2 and what they say is not so far from reality. You may find the documentaries here.

It may sound interesting to some people but I believe that it's all bull sh*t. Is it possible that a group of people dominate the whole world? I don't believe so.

Literately, it means the spirit of the time; the taste and outlook characteristic of a period or generation.

Like most of the other movements Zeitgeist is a movement initiated by the Germans. Literally it means the spirit of the time and was introduced mainly by the German Philolog Johann Gottfried Herder. Recenty the zeitgeist movement documentary made the term popular again.

See the documentary here: http://thezeitgeistmovement.com/