The extension of slavery into the western territories.
For a specific instance, see the landmark supreme court case Dred Scott v. Sandford.
Answer:
En definitiva, la tolerancia es aceptar y abrazar la diferencia, apreciar la diversidad, no tener miedo, respetar a los que no son o no piensan como nosotros, considerándolos como iguales, saber escuchar, ayudar y empatizar. Solo tenemos que abrir los ojos, con tolerancia, y el mundo será un lugar mejor para todos.
Explanation:
A confederate system sits at the other extreme in terms of centralization. A confederacy is a loose relationship among a number of smaller political units. The vast majority of political power rests with the local governments; the central federal government has very little power. Local governments have a great deal of freedom to act as they wish, but this freedom often leads to conflicts between states and the federal government. In some cases, a confederacy is little more than an alliance between independent states.