Unsteady politics in foreign countries
When you know a firearms range, you know how far the bullet or shot can travel and still cause injury.
hope this helps!
I believe the answer is Gold.
Gold was a very hot commodity at that time because before we use paper/digital money like today, Gold was made as material to make a type of money with more intrinsic value.
The abundance of this natural resources led to many European empire came and started their colonization in AFrica.
Clause 38 of the Magna Card says as follows : In future no official shall place a man on trial upon his own unsupported statement, without producing credible witnesses to the truth of it. The Magna Carta is a cedula that King Juan "without land" of England granted to the English nobles in which he undertook to respect the privileges and immunities of the nobility.