Interview with instructor Brent Jockers
Q1  Why should people train in MA when we live in the safest time in history. 
Q2  Why should people train in MA
Q3  How does one deal with anxiety or depression, in regards to training and life in general
Q4 Should we keep the traditions in martial arts or strip it down along the lines of sports such as boxing and wrestling

More on Mr. Jockers. 
He's been studying and practicing martial arts for over 30 years. 
Some notable martial arts:
HEMA
Fencing
BJJ
Boxing
Wrestling
9 Animal system of Kung Fu