Protectionism: This is an economic policy that restricts imports from other countries through methods such as tariffs and quotas. It's like building hotels on your Monopoly properties - it makes it harder for others to 'play' on your turf.
Colonialism: This refers to the practice by which a powerful country directly controls less powerful ones and exploits them economically. In our Monopoly analogy, this would be like taking over another player's properties without their consent.
Bullionism: This is a belief in the importance of accumulating precious metals, particularly gold and silver, for national wealth. It's akin to hoarding all the cash in a game of Monopoly.