Inc. All rights reserved. One reason is because there's a cost involved. Real discipleship costs. The cost is to forsake little lives, to give up claims of ownership to affluence and security.
Obedience means shifting our expectations to being a blessing instead of just being blessed.
Another reason resources and lives haven't been committed to this task is because active participation in the big picture of God's plan is also dangerous. And warfare means casualties, body counts, blood, sweat and tears. God's big purpose on this planet is not a game. It's not a spiritual health spa regimen to make us feel better. And war is never nice.