What were the causes of the memphis sanitation workers strike of 1968?

1.  Two santation workers were crushed by a malfunctioning truck

2.  the city of Memphis didn't do anything about the men that were crushed

3.  They had to work in a downpour

Explanation:

nothing certain is known about what happened, but it seems that the country declined gradually, perhaps due to bad government, or, more likely, due to a series of bad harvests, which resulted in widespread and recurrent famine.