Business Insider spoke with Tim Marshall, author of "Worth Dying For: The Power and Politics of Flags" about how the swastika was a symbol of peace until Hitler and the Nazi party changed its meaning.

FUKUYAMA, Hiroshima Prefecture--Metallic reproductions of paper cranes folded by atomic bombing victim Sadako Sasaki are being developed as durable symbols of peace for distribution around the world.

On Thursday I will hang a flag with one symbol — a giant sunflower — outside my house to celebrate the start of spring and hopefully peace in Ukraine. Symbols are organic, taking roots in a time or ...