# Analyzing the Scientific Evolution of the Sustainable Development Goals
## 3 Results
### Bibliometric Analysis: Science Mapping and Performance Analysis
#### 3.2.2. Thematic Networks  
In this section, to further explore relevant themes and future trends, three thematic networks, one per period, were selected based on their saliency, which captures developed, basic and emerging research over time. The interconnections between the themes (circles) are represented in Figure 5. The circle size indicates the number of documents, and the \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Journals** & **N\({}^{*}\) Documents** & **N\({}^{*}\) Citations** & **h-Index** & **Centrality** & **Density** \\ \hline Period 1 (1990–2010) & & & & & \\ \hline HUMAN & 338 & 19,647 & 71 & 135.4 & 35.38 \\ ENVIRONMENTAL-POLICY & 17 & 391 & 9 & 24.37 & 27.04 \\ MILLENNIUM. & 29 & 851 & 17 & 40.97 & 9.22 \\ DEVELOPMENT-GOALS & 49 & 1777 & 25 & 52.88 & 41.43 \\ HEALTH-CARE-FACILITY & 37 & 2131 & 24 & 43.3 & 5.68 \\ ECONOMICS & 38 & 1583 & 19 & 35.86 & 3.13 \\ UNITED-NATIONS & 36 & 899 & 14 & 15.59 & 7.02 \\ WATER-RESOURCE & 21 & 766 & 11 & 20 & 2.65 \\ GOVERNMENT & 20 & 1413 & 14 & 26.52 & 2.14 \\ YOUNG-ADULT & 17 & 916 & 11 & 35.57 & 6.22 \\ PRACTICE-GUIDELINE & 12 & 622 & 10 & 19.41 & 2.73 \\ HUMAN-RIGHTS & 8 & 106 & 4 & 5.53 & 0.87 \\ \hline Period 2 (2011–2015) & & & & & \\ \hline HUMAN & 732 & 25.98 & 60 & 167.09 & 53.16 \\ HEALTH-POLICY & 243 & 5679 & 38 & 74.76 & 15.38 \\ MILLENNIUM. & 131 & 4474 & 3.4 & 79.33 & 7.11 \\ DEVELOPMENT-GOALS & 21 & 923 & 13 & 6.61 & 2.77 \\ HEALTH-CARE-SYSTEM & 3.4 & 621 & 15 & 42.28 & 2.97 \\ HIV-INperfICATIONS & 26 & 490 & 14 & 23.73 & 12.05 \\ RURAL-AREA & 36 & 894 & 16 & 34.45 & 5.24 \\ TRENDS & 31 & 625 & 13 & 29.72 & 1.79 \\ UNITED-NATIONS & 58 & 1284 & 17 & 19.33 & 3.09 \\ RETROSPECTIVE-STUDY & 35 & 512 & 13 & 33.71 & 3.88 \\ FINANICAL- & 22 & 260 & 9 & 29.46 & 6.97 \\ MANAGEMENT & 21 & 262 & 11 & 22.45 & 1.61 \\ STATISTICAL-MODEL & 16 & 1262 & 11 & 22.45 & 1.61 \\ HOUSERHOLD-SURVEY & 8 & 170 & 6 & 6.45 & 4.26 \\ ENVIRONMENT & 10 & 173 & 7 & 14.12 & 3.12 \\ MOBILE-PHONE & 9 & 408 & 8 & 2.92 & 23.65 \\ NON-COMMUNICALBLE- & 10 & 517 & 9 & 8.66 & 8.44 \\ DISEASE & & & & & \\ \hline Period 3 (2016–2020) & & & & & \\ \hline HUMAN & 1152 & 18,115 & 52 & 133.63 & 45.04 \\ MATERIAL-HEALTH-SERVICES & 198 & 2503 & 22 & 42.76 & 8.66 \\ DISABILITY-ADUSTED- & 93 & 6239 & 2.3 & 29.69 & 14.06 \\ HEYEAR & 204 & 4143 & 30 & 20.61 & 6.37 \\ SUSTAABLE- & 1118 & 12,263 & 47 & 34.35 & 2.94 \\ DEVELOPMENT-GOALS & 238 & 4535 & 26 & 42.35 & 3.15 \\ HEALTH-CARE-COST & 181 & 2908 & 26 & 29.92 & 9.43 \\ ECOSYSTEMS & 88 & 1494 & 19 & 13.83 & 4.62 \\ RETROSPECTIVE-STUDY & 36 & 271 & 9 & 20.11 & 1.29 \\ HOUSERHOLD & 76 & 742 & 15 & 19.17 & 1.27 \\ INVESTMENT & 74 & 1787 & 19 & 10.81 & 2 \\ WATER-RESOURCE & 38 & 621 & 15 & 11.24 & 0.81 \\ INNOVATION & 53 & 628 & 15 & 5.13 & 1.22 \\ HEALTH-RISK & 25 & 205 & 9 & 4.41 & 2 \\ VEGETABLE & 15 & 312 & 9 & 6.33 & 22.87 \\ PROSPECTIVE-STUDY & 15 & 163 & 6 & 8.2 & 2.57 \\ ENVIRONMENTAL- & 19 & 257 & 9 & 6.28 & 2.79 \\ IMPACT-ASSESSMENT & & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 1: Performance measures of the themes. thickness of the line corresponds to the strength of the correlation between the two nodes. An analysis of the results obtained for each period is shown below. In Figure 5, we can see that the Millennium Development Goals topic is closely linked to other essential topics such as low-income population, rural area, United Nations, water resource, aid flow, climate change, economic growth, education policy and health impact, among others. Thus, in the years that preceded the introduction of the SDGs, the international development agenda focused on the economic performance of countries. The MDGs incorporated a greater focus on economic development. However, it was believed that such development would be achieved mainly through the global eradication of extreme poverty [45; 46; 47]. The MDGs and their founding document, the Millennium Declaration, focused on reducing economic poverty without a clear focus on other dimensions of development such as human rights, empowerment, and equality [48].