Quotes from book
Starship Troopers

Starship Troopers is a military science fiction novel by American writer Robert A. Heinlein. Written in a few weeks in reaction to the U.S. suspending nuclear tests, the story was first published as a two-part serial in The Magazine of Fantasy & Science Fiction as Starship Soldier, and published as a book by G. P. Putnam's Sons in December 1959.

“Any group is weaker than a man alone unless they are perfectly trained to work together.”
Source: Starship Troopers

“Violence, naked force, has settled more issues in history than has any other factor.”
Source: Starship Troopers