Homo sapiens evolved on this planet. We reached our first billion in 1800 but exploded to the second billion at about the time I was born in 1925. In just my lifetime, we have added 5 billion more people.
In nature, birth rate and death rate have to be equal or there are problems — e.g., rabbits in Australia. We either need to increase the death rate or lower the birth rate; I prefer the latter.
Planned Parenthood and I urge vasectomies, tubal ligation and contraception ---- intrauterine devices, condoms, morning after pills, Plan B or even abstinence. All humans should be born planned, wanted and loved — not unintended.