Strength primarily governs martial power.

• Boosts melee to-hit and damage in combat.
• Feeds class eligibility checks (many martial classes require high Strength).

Notes:

• Some finesse builds can use Dexterity for damage instead, based on feats.

Intelligence drives arcane aptitude and knowledge-heavy actions.

• Increases Wizard spell point bonuses.
• Contributes to class eligibility for several classes.
• Supports systems that reward analysis and item-identification skill.

Wisdom is the core divine casting and judgment score.

• Increases Cleric spell point bonuses.
• Contributes to class eligibility for faith-focused and hybrid classes.
• Affects systems that depend on perception, insight, and willpower checks.

Dexterity controls speed, precision, and defensive quickness.

• Improves Armor Class adjustment.
• Helps determine who attacks first in combat.
• Can add extra attacks at high values in melee attack logic.
• Improves pickpocket chance and other dexterity-driven checks.

Notes:

• With the right feats, Dexterity may also replace Strength for attack/damage bonuses.

Constitution determines durability.

• Adds or subtracts hit points gained per level.
• Improves poison and some magic/fear related saving-throw outcomes for specific race/class combinations.
• Helps survival in escape-style scenarios where endurance matters.

Charisma determines persuasion and likability.

• Makes monsters less likely to hate you.
• Helps whenever social presence or performance is involved.

Luck is a broad tie-breaker statistic used across many systems.

• Adjusts saving throws and special resist logic.
• Improves resurrection success chance via luck multipliers.
• Raises pickpocket success and helps escape calculations.
• Influences party-level surprise outcomes and other event probabilities.