Kagan and colleagues studied consistency in vs. temperament styles across childhood and in doing so found support for the notion that biological temperament carries on even later on in childhood when environmental factors could have influenced the child's personality.

The equal protection clause, is part of the 14th amendment to the united states constitution,the clause, which took effect in 1868 provides that no state shall deny to any person within its jurisdiction "the equal protection of the lawthe equal protection clause states that citizens are protected equally under the law