This is a long read but very interesting look at MHFA (Mental Health First Aid). The idea that it should be as common as CPR is surprising but it makes sense.
It would be nice if this training was available for our Firefighters and Police as they often deal with mental illness in their day-to-day routines.
More people are suffering and miss more time from work from depression compared to any other medical problem
Source: What if mental health first aid was as widespread as CPR?