What are some reasons as to why communism hasn't been successful in history?

—because it makes almost no sense. It is almost completely absent from our general life experience.

The main reasons? It’s a basic economic observation that is truly in nearly every human society and decision:

acts of terrorism occur globally. the united nations global counter-terrorism strategy was created in order to build adequate systems of support and solidarity with victims of terrorism. here´s a summary of the proposed key themes: the importance of giving victims a face and a voice; protecting their dignity; giving victims legal status and defending their legal rights; providing victims with medical, psycho-social and financial support; building solidarity with victims; improving media coverage of victims; and focusing on the link between victims and counter-terrorism efforts more generally.