Invisible lines: how unseen boundaries shape the world around us

By Mend Mariwany, The Conversation, Maxim Samson

Our experiences of the world are diverse, often changing as we move across borders from one country to another. They can also vary based on language or subtle shifts in climate. Yet, we rarely consider what causes these differences and divisions.

In this episode of The Conversation Weekly podcast, we speak to geographer Maxim Samson at De Paul University in the US about the unseen boundaries that can shape our collective and personal perceptions of the world – what he calls “invisible lines”.

https://shows.acast.com/60087127b9687759d637bade/6604490ffdb454001683973e

For Samson, invisible lines are: “Boundaries and belts that shape our understanding of and interactions with the planet, even though these boundaries and belts are, to all intents and purposes, unseen.”

While we may not be able to see these lines on a conventional map, people often know that they exist.

One example is the history of redlining in the US. Originating in the 1930s, the practice involved government-backed mortgage lenders colour-coding neighbourhoods. Green denoted the most desirable areas while red marked the highest-risk zones, often inhabited by Black communities.

Although redlining was officially outlawed in 1968 and the lines are no longer marked on any maps, their enduring impact resonates across America today. One example is Detroit’s 8 Mile road, which still segregates the city along racial lines – with predominantly African American neighbourhoods to the south, and predominantly white, affluent areas are to the north of 8 Mile.

But it’s not just in cities that these boundaries exist. One example Samson gives from nature is the Wallace line, which runs through parts of Indonesia and marks a sharp transition in flora and fauna between the Asian and Australian regions. On one side, you get what are considered Asian animals such as monkeys; on the other, marsupials associated with Australia.

Another invisible line is the Qinling-Huaihe line, which separates China into two distinct regions: the humid and subtropical south and the dry, temperate north.

Read Full Story https://theconversation.com/invisible-lines-how-unseen-boundaries-shape-the-world-around-us-226784