If it ever comes to pass that everyone can agree on what constitutes an ideal world, it would not likely match your concept of an ideal world or that of any other individual. It would be a compromise and therefore not technically ideal for any one individual. A universally ideal world is therefore unachievable.
An effective compromise requires that everyone’s concept of the ideal be taken into consideration. Currently, participants in the various activist movements who are seeking an ideal world seem unwilling to consider the perspectives of their opponents. Feminists, for example, refuse to consider the perspective of men’s rights activists, and vice versa.
In view of the conflicting interests among the various factions and among individuals, it would be extremely unlikely that anyone could create what they consider to be an ideal world without imposing it by force.