One of many ways to slow immigration.
Imagine if we spent the money going to "the fence" improving agriculture in Mexico.
-Jeff
https://www.goldmanprize.org/2008/northamerica
"In the Mixteca region of Oaxaca, Mexico, Jesús León Santos leads an unprecedented land renewal and economic development program that employs ancient indigenous agricultural practices to transform this barren, highly eroded area into rich, arable land. With his organization, the Center for Integral Small Farmer Development in the Mixteca (CEDICAM), a democratic, farmer-led local environmental organization, León has united the area’s small farmers. Together, they have planted more than one million native-variety trees, built hundreds of miles of ditches to retain water and prevent soil from eroding, and adapted traditional Mixteca indigenous practices to restore the regional ecosystem. Efforts are paying off as barren hillsides turn green again, aquifers are recharged, and the high rate of migration slows as indigenous farming families find they are able to make a living at home."