For want of a nail an Empire was lost.

 

"For want of a nail" is a classic proverb and nursery rhyme that illustrates how a tiny, seemingly insignificant oversight can trigger a domino effect leading to a catastrophic failure. It serves as a reminder that attention to detail is vital, as the "want" (lack) of one small thing can result in the loss of everything. 

The Full Proverb

While versions vary, the most common progression is:

• For want of a nail, the shoe was lost.
• For want of a shoe, the horse was lost.
• For want of a horse, the rider was lost.
• For want of a rider, the message was lost.
• For want of a message, the battle was lost.
• For want of a battle, the kingdom (or empire) was lost.
• And all for the want of a horseshoe nail. 

Historical Context

• Literary Origins: The proverb dates back centuries, appearing in George Herbert's 1640 collection of aphorisms and famously in Benjamin Franklin’s Poor Richard's Almanack (1758) under the title "A Little Neglect May Breed Great Mischief".
• King Richard III: The rhyme is often linked to the death of King Richard III at the Battle of Bosworth in 1485. In Shakespeare's play, the king famously cries, "A horse! A horse! My kingdom for a horse!" after his mount is killed, mirroring the final loss described in the proverb.
• Modern References: It has been featured as a recurring theme in Stephen King's The Tommyknockers and serves as the title of an alternate history novel by Robert Sobel.