Greatest problem facing us all. ( Romans 3 v 9 v 23 )

I wonder have you ever asked the question, what is the greatest problem mankind has to face?, what would be top of your concerns?,Climate change?, pollution? the poor,?,disease?,crime ?,we could go on.So what do you think?.I want to tell you what the greatest problem humanity has to face is sin, yes sin, humanities sinful nature. Let us ask the question why these random shootings ?,they are totally wicked, why such violence?, it does not make any rational sense.Often reasons are given as being religious,people with a sense of grievance, political,and often it is a mystery,but it is no mystery,to me,it is mans sinful nature. One of the characteristic of our sinful nature is clearly spelt  out in Romans 3 v 15, ''Their feet are swift to shed blood''.The 20th century was a slaughter house, from the moment Cain murdered his brother Able,mankind has followed in his footsteps. This will never change, never,only Gods common grace is restraining the violence in this world at this time,if  He removes that restraining power,all hell would break loose.Only Christ can change us from being savages to saints, He and He alone is our only hope.