I find it miracluous humans advanced during unknown years here due to density of brain, inability to learn accept differences

 In my endeavors I have learned it is almost a fight to the death to show anyone something new, to teach, to be creative and experiment, to use my imagination, explore, delve, go deep, to think, allow my mind to wander and wonder "if" this or that

The older people get the worse they usually are however
It is not limited to the age of the person, it is the individual. 
Some are just extremely fixed and rigid in their mind, thoughts, beliefs, attitudes, habits.

When confronted with a new way, a different appearance or thing they put up such resistance sometimes they actually kill the person who says, shows or does the new idea or thing.