why does the world have borders?

why does the world have borders? i think the world has borders because without one the world would be in caose because without any borders people could come and leave when they wanted and if a crime was comited they could just go to anothter country without a problem. it could hurt taxes because people could work here and claim that they didnt live here so there would be not taxes. i guess thats right?

US Mexico benifits

HI it's austin from austinscraziness, I am in my "office" in my room pondering how the us benifits Mexico. First of all in my research I learned that the us benifits Mexico with tourism which bumps up the economy which gives mo money to mexico. Also the us commissioner of social security and the director general of mexican social security institute signed a "tatalization" agreement. "totalization agreement elliminste the need to pay social secutity taxes in both countries when companies in one counrty sends workers to the other counrty, and they protect benifit eligibility for workers who devide their careers between the two countries." The US has a total of 20 totalilzation greements with other countries. this has not been aproved between mexico but will definetly be a benifit to mexico if it passes, Mexico benifits the US by having workers that will pretty much do anything to help themm get a better life. they also help with trade.

for the first two words im not quiete sure what I should put at the moment maybe. some of the policies that harms mexico would be the U.S mexico border because with the border being there it causes a lot of problems because of the constant border patrol presance. another harm is the problem with illegal drugs next to the border.
plan: how to fix the first one is to spread the border partol out so their not all in one spot. and 2 increase the number of screenings.
the good things that will come out of this will be that less illegal immigrantes will be in the US and also less drugs will be in aswell.

2 Way that america effects mexico and visa versa

Well one obvious thing is the quality of the water, mexico effects america by discharging its untreated water straight into the Pacific Ocean which is then pushed into U.S. beaches because of the tides. Secondly another way that Mexico effects the U.S. is immigration. immigration effects America because it can take jobs away from other and it makes the cities more packed and unwanted.
1 way the america effects Mexico is making almost everyone think that mexico is a horribable place where infact it accualy not. 2nd is it effects how the bordeer cities work.