These people may not have always behaved the way they do now. This means that we, as humans, tend to be vessels, changing our behaviors and characteristics to suit the time and season.
I definitely agree. People can think irrationally at times of survival mode. They say, the only time you can truly know someone is thru adversity and hardships because by then, their true colors of greed would start to show.
This is true. Survival mode is unpredictable and people can do different things just to survive. I believe the world is moving away from that level, but a huge catastrophe can cause people to be in survival mode