What do you think about psychopaths?

What different forms of manipulation can they do to another person’s mind, and how do they do it?
Why does death lure some psychopaths so much?
Not all psychopaths are murderers, but some tend to be, even with a healthy past.
Why is this, in your opinion?‎
I should like to thank you most sincerely for your replies.
I present my heartfelt gratitude and deep thanks to you.