Movie - The day the earth stood still (2008)

This new verson is certainly preachy but is adapted to the current mindset. It feels like a small movie.

(spoiler alert) 

She saves humanity from extermination, but does it all happens in secret, so does it save the planet from humanity?

• http://www.imdb.com/title/tt0970416/
  
• wiki: The_Day_the_Earth_Stood_Still_(2008_film)