Explanation:
The most common crime committed globally is **theft**. This is primarily due to:
1. **Economic Factors**: Poverty and unemployment drive people to steal.
2. **Opportunity**: Theft is often easy to commit, especially in crowded or poorly secured areas.
3. **Low Risk**: Petty theft typically carries less severe punishment, making it more appealing to offenders.
4. **Urbanization**: High population density in cities creates more opportunities for theft.