I just thought it worth mentioning a few things that population control has led to in the past...
In 1838 and 1839, as part of Andrew Jackson's Indian removal policy, the Cherokee nation was forced to give up its lands east of the Mississippi River and to migrate to an area in present-day Oklahoma. The Cherokee people called this journey the "Trail of Tears," because of its devastating effects. The migrants faced hunger, disease, and exhaustion on the forced march. Over 4,000 out of 15,000 of the Cherokees died.
The Trail of Tears
For the next 28 years, the United States government struggled to force relocation of the southeastern nations. A small group of Seminoles was coerced into signing a removal treaty in 1833, but the majority of the tribe declared the treaty illegitimate and refused to leave. The resulting struggle was the Second Seminole War, which lasted from 1835 to 1842. As in the first war, fugitive slaves fought beside the Seminoles who had taken them in. Thousands of lives were lost in the war, which cost the Jackson administration approximately 40 to 60 million dollars -- ten times the amount it had allotted for Indian removal. In the end, most of the Seminoles moved to the new territory. The few who remained had to defend themselves in the Third Seminole War (1855-58), when the U.S. military attempted to drive them out. Finally, the United States paid the remaining Seminoles to move west.
The Creeks also refused to emigrate. They signed a treaty in March, 1832, which opened a large portion of their Alabama land to white settlement, but guaranteed them protected ownership of the remaining portion, which was divided among the leading families. The government did not protect them from speculators, however, who quickly cheated them out of their lands. By 1835 the destitute Creeks began stealing livestock and crops from white settlers. Some eventually committed arson and murder in retaliation for their brutal treatment. In 1836 the Secretary of War ordered the removal of the Creeks as a military necessity. By 1837, approximately 15,000 Creeks had migrated west. They had never signed a removal treaty.
Indian removal
There were approximately 750000 Aborigines when Sydney was first settled by the British. The British thought they could take away the land from the natives, because they saw no system of government, no commerce or permanent settlements and no evidence of landownership. The Sydney Cove colony was founded on the legal principle of "terra nullius" - this meant that the land belonged to no one. The settlers were able to take land from the Aborigines. Finally, in 1993, they recognised that the native title had existed before the arrival of the British and the notion of terra nullius was overthrown.
Aborigines in Australia
The Nazis then combined their racial theories with the evolutionary theories of Charles Darwin to justify their treatment of the Jews. The Germans, as the strongest and fittest, were destined to rule, while the weak and racially adulterated Jews were doomed to extinction. Hitler began to restrict the Jews with legislation and terror, which entailed burning books written by Jews, removing Jews from their professions and public schools, confiscating their businesses and property and excluding them from public events. The most infamous of the anti-Jewish legislation were the Nuremberg Laws, enacted on September 15, 1935. They formed the legal basis for the Jews' exclusion from German society and the progressively restrictive Jewish policies of the Germans.
In nearly every country overrun by the Nazis, the Jews were forced to wear badges marking them as Jews, they were rounded up into ghettos or concentration camps and then gradually transported to the killing centers. The death camps were essentially factories for murdering Jews. The Germans shipped thousands of Jews to them each day. Within a few hours of their arrival, the Jews had been stripped of their possessions and valuables, gassed to death, and their bodies burned in specially designed crematoriums.
Approximately 3.5 million Jews were murdered in these death camps.
History of the Holocaust - An Introduction
So while I'm sure while well meaning the comments made in reference to the population being smaller, I suggest there are other ways in which we can educate people,house, feed, and give them a chance at life, so that education in such things as contraception are not so foreign.