What beliefs did americans hold about themselves and their country from 1800-1870?

The belief that the Americans hold about themselves and their country is Patriotism.

Patriotism is also called the national pride.

Patriotism refers to the devotion or sense of attachment to one's country and alliance with other citizens of the country.

The patriotism in the colonist and ordinary citizen led to the successful revolution against Britain because they felt they deserved better than their current country condition.

Therefore, the Patriotism is the belief that was common among the Americans during the period of 1800 - 1870.

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the three roles stated in the dialogue develop the siblings' personalities.

lloyd's personality looks like a trademarketer

dana's personality is afraid from lloyd's behavior and the oldest sister is a decided person who tries to solve any conflict