NO LINKS OR ELSE YOU'LL BE REPORTED! Only answer if you're very good at History. Why doesn't the 1820 solution work today?​

It doesn't work today because we are 50 (soon 51) states, not the mere 22 that existed in 1820.

Also, ummm, slavery is wrong? what kind of question is this?

the scientific method has six steps.

explanation:

What is the six steps of the scientific method?

The process of the scientific method involves making conjectures (hypotheses), deriving predictions from them as logical consequences, and then carrying out experiments or empirical observations based on those predictions. Scientists then test hypotheses by conducting experiments or studies.

el método científico tiene seis pasos.

explicación:

¿Cuáles son los seis pasos del método científico?

El proceso del método científico implica hacer conjeturas (hipótesis), derivar predicciones de ellas como consecuencias lógicas y luego realizar experimentos u observaciones empíricas basadas en esas predicciones. Luego, los científicos prueban hipótesis mediante la realización de experimentos o estudios.