This paper is a comparative analysis of the crime of genocide in relation with other similar crimes, for example, some crimes against the person (homicide, bodily harm, illegal deprivation of liberty), the so-called “terrorist attacks” or crimes against humanity. Such an analysis underlines several shortcomings of the current definition, the first one being that the delimitation of genocide from all these crimes has as unique criterion a subjective element which is variable and impossible to verify, consisting of the wish to destroy a certain group of people. At the same time, the paper brings some possible corrections.