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<\/figure>\n<\/div>\n\n\nCharles Darwin: Understanding \u2018Survival of the fittest\u2019 and the Theory of Evolution<\/strong> The phrase \u201csurvival of the fittest\u201d was first used by Herbert Spencer after reading Here, \u201cfittest\u201d does not mean strongest, but those best adapted to their environment. Individuals with favourable traits survive and reproduce more successfully, passing those traits to the next generation. Over time, this process leads to evolution.<\/p>\n\n\n\n Course of Human Population and Doubling Time<\/strong><\/p>\n\n\n\n Human population growth has changed dramatically over time.<\/p>\n\n\n\n Early history: <\/strong>For thousands of years, the population grew very slowly due to high birth and death rates. It took about 1,500 years for the world population to double from around 300 million (1 AD) to 600 million (around 1650).<\/p>\n\n\n\n Industrial period:<\/strong> With improvements in agriculture, sanitation and medicine, death rates fell. The population doubled much faster \u2013 from 1 billion (1804) to 2 billion (1927) in about 123 years.<\/p>\n\n\n\n 20th-century population explosion:<\/strong> Growth became even faster. The population doubled from 3 billion (1960) to 6 billion (1999) in just 39 years.<\/p>\n\n\n Present Situation<\/strong><\/p>\n\n\n\n Today, the global population growth is slow. Many countries have low birth rates due to urbanisation, education, women\u2019s empowerment, and access to family planning.<\/p>\n\n\n\n Read the full article in the latest issue of Viva Goa Magazine. Pick your copy from the nearest supermarket\/bookstore today.<\/em><\/strong><\/p>\n","protected":false},"excerpt":{"rendered":" The universe is constantly expanding, and life itself is driven by growth and reproduction. More so, as human intellect peaks and social complexity reaches new heights, global population growth is slowing; and in many regions, even declining. As a result, fertilitypreservation has emerged as a crucial tool, allowing individuals to align their biological potential with […]<\/p>\n","protected":false},"author":1,"featured_media":1412,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[23,31,1],"tags":[],"class_list":["post-1410","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-health","category-healthy-living","category-uncategorized"],"jetpack_featured_media_url":"https:\/\/vivagoaonline.in\/wp-content\/uploads\/2026\/06\/fertility.jpg","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/vivagoaonline.in\/index.php\/wp-json\/wp\/v2\/posts\/1410","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vivagoaonline.in\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vivagoaonline.in\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vivagoaonline.in\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vivagoaonline.in\/index.php\/wp-json\/wp\/v2\/comments?post=1410"}],"version-history":[{"count":4,"href":"https:\/\/vivagoaonline.in\/index.php\/wp-json\/wp\/v2\/posts\/1410\/revisions"}],"predecessor-version":[{"id":1416,"href":"https:\/\/vivagoaonline.in\/index.php\/wp-json\/wp\/v2\/posts\/1410\/revisions\/1416"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/vivagoaonline.in\/index.php\/wp-json\/wp\/v2\/media\/1412"}],"wp:attachment":[{"href":"https:\/\/vivagoaonline.in\/index.php\/wp-json\/wp\/v2\/media?parent=1410"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vivagoaonline.in\/index.php\/wp-json\/wp\/v2\/categories?post=1410"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vivagoaonline.in\/index.php\/wp-json\/wp\/v2\/tags?post=1410"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}
Charles Darwin was an English naturalist who developed the theory of evolution by natural selection. In his 1859 book, \u2018On the Origin of Species\u2019, he explained that living organisms produce more offspring than can survive, creating a struggle for existence.<\/p>\n\n\n\n
Darwin\u2019s work. Darwin later adopted the phrase in subsequent editions of his book.<\/p>\n\n\n\n![\"\"](\"https:\/\/vivagoaonline.in\/wp-content\/uploads\/2026\/06\/fertility2.jpg\")
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