Brief description

Fire is a rapid oxidation chemical reaction that releases heat and light. It is one of humanity’s most fundamental discoveries, allowing control over the environment.

Use / Function

• Cooking: Makes food more digestible and eliminates pathogens.
• Heating: Allows survival in cold climates.
• Protection: Keeps predators away.
• Lighting: Extends hours of activity after sunset.
• Materials processing: Hardening wood, smelting metals, or firing pottery.

Operating principle

It is based on the Fire Triangle, which requires three components:

1. Fuel: Material that burns (wood, charcoal).
2. Oxidant: Usually oxygen from the air.
3. Activation energy: Initial heat to start the reaction.

How to create it

• Friction: Hand Drill Fire, Bow Drill Fire, Fire Plow, Fire Saw.
• Percussion: Flint and Pyrite Ignition.
• Compression: Fire Piston.
• Solar: Solar Ignition.

Minimum functional version: a dry tinder bundle, an ember source (friction or sparks), and staged kindling that grows a stable flame.

Required technological level

Basic to intermediate. Friction methods are low tech; reliable ignition and fuel control improve with practice.

Materials needed

• Essential: Dry wood, tinder (dry leaves, fungi, fine fibers).
• Tools: Flint stones, hard and soft wood sticks.
• Substitutes: Dry dung or peat for fuel, resin-rich bark for tinder, or charcoal dust as ember extender.

Variants and improvements

• Torches: For light transport.
• Controlled bonfires: For cooking and heat.
• Matches and lighters: Modern versions for instant ignition.

Limits and risks

• Wildfires: Can spread out of control destroying ecosystems or homes.
• Burns: Direct damage to living tissues.
• Asphyxiation: Smoke in closed places can be deadly.