He discouraged vaccinations because disease was a natural means of population control.
Thomas Malthus worried that the amount of resources ( such as food and water) in the world would not be able to keep up with the increasing number of population in the world.
He believed that diseases are natures'ways of population control to ensure that the resources is enough to accommodate all organisms in the world. Because of this, he believe vaccinations as interference of the natural order.
The reason the joined the triple alliance was for more control and goods
Hope that helped thanks are welcomed
In an effort to prevent any alliances between the Cherokee Indians and the Mexicans, the Federal Government sent Sam Houston and John Forbes to the territories occupied by the Native Americans in order to negotiate the boundaries in which they could peacefully settle. These negotiations ended with a treaty on February 23, 1836. However, this document was rejected by the Senate because it considered the consultation had exceeded its powers by offering land grants to the Cherokees. Houston decided to disregard this and maintained the kept the treaty made with the Indians. However, President Mirabeau B. Lamar would ultimately agree with the Senate's interpretations and leave the treaty without effect.