future
if we started to just take a few to heart and do sincere teshuva about it THEN ALL TRAGEDIES WOULD COME TO A HALT & WE WOULD NOT NEED TO TAKE ANY MORE TO HEART.
one thing forgot to mention earlier is the famous line “ain poraneius baolam ela bshvil yisroel” there are no tragedies in the world except on the account of klal yisroel. i.e. even if there are no yidden involved in the tragedy. like just occurred today in Berlin killing & injuring many.