Also, in the movie Civil War there is an argument about where power should lie. Stark wants the Government to be in charge of the Avengers; Cap believes that the power is best left in their own hands. Toward the end of the movie, you see that Stark's govt. approach has all of the Avengers sitting in jail cells. Stark seems surprised by this; but, we know that this is where the govt. control will lead. Cap was right.
The other thing that people who dismiss these films as simply "comic book movies" are missing a lot of very entertaining films. Another amazing thing about these films is that the Producers put together a string of 18-20 (don't remember the exact number) movies that fit together, one following the other and all culminating in the final two movies that tie everything together.
100%
I the the 4 Averngers movies (encompassing the other 14) was motion picture genius that land them collectively as one of the single greatest movies ever.