Looking at such questions as infrastructure (transportation and communication, harsh social conditions that contribute to violence and crime, and lastly being able to build the stadiums and venues as well as house the athletes and provide enough hotels fordelegates. media and tourists.

Also a stable government that is capable of meeting such a challenge at both the national and local level.

http://news.bbc.co.uk/2/hi/americas/country_profiles/1227110.stm

if china can do it, brasil can do it
anything china can do, brasil can do better

(excluding womens gymnastics)

l doubt it. The developed world struggles to host it, l can not imagine a semi-developed nation like Brazil succeeding.

Definitely not, in aspects such as GDP and economy of the country, in addition to building the infrastructure to accommodate tourists, and to build new venues would be a blow to a developing country is economy, l would guess no.

if a city is 100% committed to the cause, l think they can. but they wo not get the bid, at least not until they can make a better case

IMO, NO. 2016 may be a little too soon for that to happen for all the reasons you list. l think the social and economic conditions prevent RDJ from hosting more than anything currently.