Well , as humans advance further and further , I predict that even the eating of meat will gradually go out of fashion ( it is a sort of animal killing , after all ) . But the human race has a lot of time . The banning of animal sacrifice is only a first step ( a first step that was taken in India for the first time by Ashok . Funnily enough , within a few generations of Ashok , all "respectable" ( as described by a traveller of the time ) people became vegetarians in India ) , but a necessary first step .