Souls and Population Growth

I’ve been asked by skeptics over the years why is our population continually growing if souls are being reborn through reincarnation? I’ve never been able to answer that. I’d like to add this: If there is a Spirit, or as you call it: God, and that entity is still watching over all creation, why IS our population growing out of hand?
Forgive me if I’ve just not read enough to have found these answers. I’ve only just begun to learn from you. I’ve already learned so much! I can’t wait till August and I can go to Arizona for a seminar. I wish there was one sooner! But I’ll be patient and take the time to read everything I can and take it slowly enough to absorb it and understand it. Thanks so much and for answering these questions. Peace.