A powerful investigation into the chances for humanity's future from the author of the bestseller The World Without Us .

In his bestselling book The World Without Us , Alan Weisman considered how the Earth could heal and even refill empty niches if relieved of humanity's constant pressures. Behind that groundbreaking thought experiment was his hope that we would be inspired to find a way to add humans back to this vision of a restored, healthy planet-only in harmony, not mortal combat, with the rest of nature.

But with a million more of us every 4¿ days on a planet that's not getting any bigger, and with our exhaust overheating the atmosphere and altering the chemistry of the oceans, prospects for a sustainable human future seem ever more in doubt. For this long awaited follow-up book, Weisman traveled to more than 20 countries to ask what experts agreed were probably the most important questions on Earth--and also the hardest: How many humans can the planet hold without capsizing? How robust must the Earth's ecosystem be to assure our continued existence? Can we know which other species are essential to our survival? And, how might we actually arrive at a stable, optimum population, and design an economy to allow genuine prosperity without endless growth?

Weisman visits an extraordinary range of the world's cultures, religions, nationalities, tribes, and political systems to learn what in their beliefs, histories, liturgies, or current circumstances might suggest that sometimes it's in their own best interest to limit their growth. The result is a landmark work of reporting: devastating, urgent, and, ultimately, deeply hopeful.

By vividly detailing the burgeoning effects of our cumulative presence, Countdown reveals what may be the fastest, most acceptable, practical, and affordable way of returning our planet and our presence on it to balance. Weisman again shows that he is one of the most provocative journalists at work today, with a book whose message is so compelling that it will change how we see our lives and our destiny.

艾伦•韦斯曼（Alan Weisman）,美国最著名的科学记者,在亚利桑那大学教授国际新闻写作。《哈珀斯》、《纽约时报杂志》、《大西洋月刊》、《发现》杂志和美国国家公共电台最重要的撰稿人和制作人。 曾任《洛杉矶时报杂志》的特约编辑,现在新闻从业者团体Homelantls Productionsrp担任资深出品人。

艾伦•韦斯曼在美洲、欧洲、非洲,以及俄罗斯和中东地区都做过环境科学的深度报道,多部作品被收入《全美最佳科学写作文集》中,除了写作,他为国家公共媒体制作纪录片。他获奖无数, 所获奖项包括：

洛杉矶记者协会最佳专题报道奖、

西方最佳新闻写作奖

罗伯•甘酋迪新闻奖

联合媒体奖

巴西政府颁发的全国最佳新闻奖

等等

1998年,他的《葛维欧塔村：重新发现文明世界》,获得美国智库颁发的奖项。

2006年,因《没有我们的世界》获得美国最佳科学写作奖、中国第四届文津奖。

2014年因《倒计时》荣获《洛杉矶时报》图书奖、全球非营利机构人口学会全球最佳媒体奖、鹦鹉螺图书奖,等等。