What factor would have mostly likely prevented the problems that cities faced during urbanization?

Effective urban planning and infrastructure development would have most likely prevented many problems faced by cities during urbanization. Implementing comprehensive zoning laws, public transportation systems, and adequate housing policies could have alleviated issues like overcrowding, pollution, and inadequate sanitation. Additionally, investing in social services and community resources would have helped address disparities and improve quality of life for urban residents. Ultimately, proactive governance and sustainable development strategies would have fostered healthier urban environments.