For the first time ever, more people now live in cities than outside them. Cities offer both big headaches and vast opportunities, and agencies that once focused on rural work are increasingly turning their attention to urban centers. Join veteran researcher and missiologist Patrick Johnstone as he explores the fastest growing cities and megacities in the world, showing how Christian workers are addressing people’s spiritual, physical, and social needs. God has a heart for today’s cities. See how you can join this urgent mission.