The fill in the blank answer is The 1985 Mexico City Earthquake.
While under increasing economic pressure the capital and largest city of the country, Mexico city was struct by a large scale with a moment magnitude of 8.0
Aftershocks caused further damage, overall injuring 30,000 and killing approx. 20,000 people.
Buildings and infrastructure collapsed with the cost of the earthquake reaching into tens of billions of dollars to the Mexican economy. <span />
It interpreted racial segregation as acceptable under the equal protection clause at a time when racism was still socially acceptable. ... It challenged southern ideas of white supremacy at a time when northern states were extremely supportive of equal rights for all races.
