We are simple humans.

Infancy: Birth to 18 Months

Ego Development Outcome: Trust vs. Mistrust

Basic strength: Drive and Hope

The most significant relationship is with the maternal parent, or whoever is our most significant and constant caregiver.

Early Childhood: 18 Months to 3 Years

Ego Development Outcome: Autonomy vs. Shame

Basic Strengths: Self-control, Courage, and Will

The most significant relationships are with parents.

Play Age: 3 to 5 Years

Ego Development Outcome: Initiative vs. Guilt

Basic Strength: Purpose

The most significant relationship is with the basic family.

School Age: 6 to 12 Years

Ego Development Outcome: Industry vs. Inferiority

Basic Strengths: Method and Competence

Our most significant relationship is with the school and neighborhood. Parents are no longer the complete authorities they once were, although they are still important.

Adolescence: 12 to 18 Years

Ego Development Outcome: Identity vs. Role Confusion

Basic Strengths: Devotion and Fidelity

It is no surprise that our most significant relationships are with peer groups.

Young adulthood: 18 to 35

Ego Development Outcome: Intimacy and Solidarity vs. Isolation

Basic Strengths: Affiliation and Love

Our significant relationships are with marital partners and friends.

Middle Adulthood: 35 to 55 or 65

Ego Development Outcome: Generativity vs. Self absorption or Stagnation

Basic Strengths: Production and Care

Significant relationships are within the workplace, the community and the family.

Late Adulthood: 55 or 65 to Death

Ego Development Outcome: Integrity vs. Despair

Basic Strengths: Wisdom

The significant relationship is with all of mankind—"my-kind."

-Hacked, admittedly, from here

It is all about relationships.

Identity and the Life Cycle, Erik Erikson

Chilhood and Society, Erik Erikson