Research literature on causational factors and diverse goals that drives people to resort to carry out terrorist acts is inconclusive. How these two are connected can be a matter of debate: are researched causes derived from terrorists' manifestos, implicitly or explicitly worded goals, or are living conditions perceived as unjust and not decent and therefore its goals may be inferred, or a mere conjecture? Multiple reasons are listed here, of which some seem to be more appliccable than others, and some others tend to go together for identification of more or less convincing causational factors.