If Disaster Strikes on a global event level, expect Satellites to stop functioning or to start coming down withing three days time. Expect impacts to function of anything electronic, lost data, lost use of systems that run facilities and of transportation. If you had to survive based on what you own or have access to in your own house while rebuilding, food and water plus an assortment of items like books and clothing plus durable home goods, OTC items for medical use in the field, and personal items for security are likely to become treasured commodities. In the 19th century, Homesteaders would be the closest thing to 20th Century Preppers (meaning a group of people who plan home space and storage to accommodate storing of food and supply designed to assist them in surviving during times of war or of civics impacted by natural and or man made disasters.