Migrants leaving Africa for Europe perish in the Mediterranean Sea, who is to blame?

We all recently watched migrants leaving Africa for Europe perish in the Mediterranean Ocean. Who do we blame? Do we blame their respective governments for not providing them with enough job opportunities?

Do we censure the Libyan government for letting them use their waters without any persecution?  Do we blame Europe for giving us a way of thinking that it is  too good a place to be as compared to our own motherland – Africa? Or bolder still, do we blame the Libyans for overthrowing Gaddafi – since in the Gaddafi era there was a strict watch of the passage of migrants from the Libyan sea ports?