Third, the main challenge facing the international community in multilateral activities, particularly in relation to disarmament, is a lack of trust, notably concerning the commitment of States to honouring agreements on decisions and obligations. For as long as some States choose to be selective about meeting their obligations, trust will continue to be lacking and no verification system could be effective in achieving nuclear disarmament. Indeed, history has shown, time and again, that, so long as the nuclear programmes of certain States are ignored or certain States are allowed to possess nuclear weapons, in the absence of any genuine move to achievement full nuclear disarmament and a world free of nuclear weapons, other States will view this state of affairs as an incentive to develop their nuclear weapons.