Memory Memoria: Ser Humano y SustentabilidadVersion en ligne Descubre conceptos clave sobre la relación entre el ser humano y la sustentabilidad. par HECTOR GARCIA Life expectancy was around thirty years. There were no toilets. Everything was infested with insects and rodents. They built their own dwellings. They grew most of their own food. The enrichment of the last centuries is the hockey stick of human prosperity Our ancestors ate gruel Most of our ancestors lived in huts with dirt floors and thatched roofs. Smallpox was eradicated in 1977. They made a lot of their own clothing. One in four kids would die before the age of 5. Today it is more like 1 in 200. We grow to be four inches taller than we were just 250 ago. Streets and alleys were open sewers. The filth was horrible and often toxic. The astonishing growth in prosperity is one of the greatest events ever. Today we expect to live to be about eighty. They wore the same home-made underwear over and over.