Trilobites were rapidly evolving and widespread marine organisms that spanned a number of geologic time periods. Certain types of trilobites only appeared in specific segments of geologic time; therefore, when one of these trilobites is found, you can be certain that the rock layer it is found in is of a certain geologic age.
The north benefits from refusing slavery because the north is against slavery
The government stays out of affairs and lets the market mange itself. In this vien, Adam Smith’s “invisible hand” is the idea that there is an invisible force or hand that drives and manages the economy. People who subscribe to this form of economic thought usually favor small government intervention...they think the market will take care of itself and doesn’t need government subsidies, regulation, etc.
