Why would the Spanish want to try and stop Lewis and Clark from completing their expedition?

The expedition failed at their main goal of finding an all water route across the continent, they did however succeed in finding new information about the plants, animals, and Native Americans that were in the region so that American knowledge and culture could become greater.

in the declaration of independence, thomas jefferson announced that every human being has “certain unalienable rights,” among which are those to “life, liberty, and the pursuit of " hope i

no one really purchased it themselves, it was all america, they had debates etc.