There were a billion people in 1800? Cool...
Well, here is the thing:
There is not a food shortage. In fact, the majority of food waste occurs in the poorest countries due to lack of refrigeration and other resources that would help them maintain their food.
Rather, Capitalsm and misguided charities has led to this problem.
(a) Western Governments force democracy and free markets onto impoverished nations and they take away all of the raw natural resources hey can to use in their manufacturing and they pay the workers a pittance; if any manufacturing is done, likewise, the workers earn a small amount of money.
(b) The people who make millions & billions of dollars from this process then give away $100,000 of their money (or more) and they pat themselves on the back and say that they have done a good job.
They build a hospital and supply charitable goods to people, and they use modern medicine and pesticides to increase the food and cheap medicine supply which helps maintain a massive surplus of labor which helps insure that they do not have to pay Jack and/or Diddly for their labor.
(c) Then, people see the squalor and think the world is overpopulatd when, in reality, subsistence farming and protectionist economic policies would alone have kept the population lower while giving more opportunities to those who were alive...
It is a fun process I like to refer to as the systematic exploitation and bleeding dry of the third world countries so that Western Europeans & North Americans can pretend they have reached the highest heights of civilization from their safe homes.
And this is where the liberal hubris comes from: the idea that they have become the most righteous in the world because of the prosperity that exists at home...
And what is the solution?
(a) Socialist revolutions in small countries that isolate and protect their economies from exploitation from the carrion birds of Capitalism we call 'corporations.
(b) Free birth control and medical attention for impoverishd women; encouraging the voluntary sterilization of all women who have had 1 or 2 children and promising them more benefits to make this choice.
(c) Free and more accessible education; huge investments into education.
(d) Employing the impoverished to build their own homes and to build better schools and streets and infrastructure;
(e) Small business loans
(f) No interest loans to agricultural workers that help them buy their own land and develop a sense of pride and place as opposed to being nothing more than the likes of a hacienda worker.
(g) Howl mockery at the perverted McDonalds, Nike, Samsung, Dolce & Gabbana, Hollywood, Etc. and ban them, oppose them; put tarriffs on their sister companies.